diff --git a/packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js b/packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js
index 7d4220460d9..bd0c6107f37 100644
--- a/packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js
+++ b/packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js
@@ -6509,7 +6509,6 @@ describe('ReactDOMFizzServer', () => {
   });
 
   describe('useEffectEvent', () => {
-    // @gate enableUseEffectEventHook
     it('can server render a component with useEffectEvent', async () => {
       const ref = React.createRef();
       function App() {
@@ -6540,7 +6539,6 @@ describe('ReactDOMFizzServer', () => {
       expect(getVisibleChildren(container)).toEqual(<button>1</button>);
     });
 
-    // @gate enableUseEffectEventHook
     it('throws if useEffectEvent is called during a server render', async () => {
       const logs = [];
       function App() {
@@ -6572,7 +6570,6 @@ describe('ReactDOMFizzServer', () => {
       expect(reportedServerErrors).toEqual([caughtError]);
     });
 
-    // @gate enableUseEffectEventHook
     it('does not guarantee useEffectEvent return values during server rendering are distinct', async () => {
       function App() {
         const onClick1 = React.useEffectEvent(() => {});
diff --git a/packages/react-reconciler/src/ReactFiberCommitWork.js b/packages/react-reconciler/src/ReactFiberCommitWork.js
index ecacb0c1585..43db744007d 100644
--- a/packages/react-reconciler/src/ReactFiberCommitWork.js
+++ b/packages/react-reconciler/src/ReactFiberCommitWork.js
@@ -54,7 +54,6 @@ import {
   enableScopeAPI,
   enableUpdaterTracking,
   enableTransitionTracing,
-  enableUseEffectEventHook,
   enableLegacyHidden,
   disableLegacyMode,
   enableComponentPerformanceTrack,
@@ -500,17 +499,14 @@ function commitBeforeMutationEffectsOnFiber(
     case FunctionComponent:
     case ForwardRef:
     case SimpleMemoComponent: {
-      if (enableUseEffectEventHook) {
-        if ((flags & Update) !== NoFlags) {
-          const updateQueue: FunctionComponentUpdateQueue | null =
-            (finishedWork.updateQueue: any);
-          const eventPayloads =
-            updateQueue !== null ? updateQueue.events : null;
-          if (eventPayloads !== null) {
-            for (let ii = 0; ii < eventPayloads.length; ii++) {
-              const {ref, nextImpl} = eventPayloads[ii];
-              ref.impl = nextImpl;
-            }
+      if ((flags & Update) !== NoFlags) {
+        const updateQueue: FunctionComponentUpdateQueue | null =
+          (finishedWork.updateQueue: any);
+        const eventPayloads = updateQueue !== null ? updateQueue.events : null;
+        if (eventPayloads !== null) {
+          for (let ii = 0; ii < eventPayloads.length; ii++) {
+            const {ref, nextImpl} = eventPayloads[ii];
+            ref.impl = nextImpl;
           }
         }
       }
diff --git a/packages/react-reconciler/src/ReactFiberFlags.js b/packages/react-reconciler/src/ReactFiberFlags.js
index 7fa1dcb8173..2d8d3f7fd16 100644
--- a/packages/react-reconciler/src/ReactFiberFlags.js
+++ b/packages/react-reconciler/src/ReactFiberFlags.js
@@ -7,10 +7,7 @@
  * @flow
  */
 
-import {
-  enableCreateEventHandleAPI,
-  enableUseEffectEventHook,
-} from 'shared/ReactFeatureFlags';
+import {enableCreateEventHandleAPI} from 'shared/ReactFeatureFlags';
 
 export type Flags = number;
 
@@ -102,12 +99,10 @@ export const BeforeMutationMask: number =
       // TODO: Only need to visit Deletions during BeforeMutation phase if an
       // element is focused.
       Update | ChildDeletion | Visibility
-    : enableUseEffectEventHook
-      ? // TODO: The useEffectEvent hook uses the snapshot phase for clean up but it
-        // really should use the mutation phase for this or at least schedule an
-        // explicit Snapshot phase flag for this.
-        Update
-      : 0);
+    : // TODO: The useEffectEvent hook uses the snapshot phase for clean up but it
+      // really should use the mutation phase for this or at least schedule an
+      // explicit Snapshot phase flag for this.
+      Update);
 
 // For View Transition support we use the snapshot phase to scan the tree for potentially
 // affected ViewTransition components.
diff --git a/packages/react-reconciler/src/ReactFiberHooks.js b/packages/react-reconciler/src/ReactFiberHooks.js
index 422667c6a12..0450495ff0d 100644
--- a/packages/react-reconciler/src/ReactFiberHooks.js
+++ b/packages/react-reconciler/src/ReactFiberHooks.js
@@ -38,7 +38,6 @@ import ReactSharedInternals from 'shared/ReactSharedInternals';
 import {
   enableSchedulingProfiler,
   enableTransitionTracing,
-  enableUseEffectEventHook,
   enableLegacyCache,
   disableLegacyMode,
   enableNoCloningMemoCache,
@@ -3893,10 +3892,8 @@ export const ContextOnlyDispatcher: Dispatcher = {
   useOptimistic: throwInvalidHookError,
   useMemoCache: throwInvalidHookError,
   useCacheRefresh: throwInvalidHookError,
+  useEffectEvent: throwInvalidHookError,
 };
-if (enableUseEffectEventHook) {
-  (ContextOnlyDispatcher: Dispatcher).useEffectEvent = throwInvalidHookError;
-}
 
 const HooksDispatcherOnMount: Dispatcher = {
   readContext,
@@ -3923,10 +3920,8 @@ const HooksDispatcherOnMount: Dispatcher = {
   useOptimistic: mountOptimistic,
   useMemoCache,
   useCacheRefresh: mountRefresh,
+  useEffectEvent: mountEvent,
 };
-if (enableUseEffectEventHook) {
-  (HooksDispatcherOnMount: Dispatcher).useEffectEvent = mountEvent;
-}
 
 const HooksDispatcherOnUpdate: Dispatcher = {
   readContext,
@@ -3953,10 +3948,8 @@ const HooksDispatcherOnUpdate: Dispatcher = {
   useOptimistic: updateOptimistic,
   useMemoCache,
   useCacheRefresh: updateRefresh,
+  useEffectEvent: updateEvent,
 };
-if (enableUseEffectEventHook) {
-  (HooksDispatcherOnUpdate: Dispatcher).useEffectEvent = updateEvent;
-}
 
 const HooksDispatcherOnRerender: Dispatcher = {
   readContext,
@@ -3983,10 +3976,8 @@ const HooksDispatcherOnRerender: Dispatcher = {
   useOptimistic: rerenderOptimistic,
   useMemoCache,
   useCacheRefresh: updateRefresh,
+  useEffectEvent: updateEvent,
 };
-if (enableUseEffectEventHook) {
-  (HooksDispatcherOnRerender: Dispatcher).useEffectEvent = updateEvent;
-}
 
 let HooksDispatcherOnMountInDEV: Dispatcher | null = null;
 let HooksDispatcherOnMountWithHookTypesInDEV: Dispatcher | null = null;
@@ -4176,17 +4167,14 @@ if (__DEV__) {
       mountHookTypesDev();
       return mountRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      mountHookTypesDev();
+      return mountEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (HooksDispatcherOnMountInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        mountHookTypesDev();
-        return mountEvent(callback);
-      };
-  }
 
   HooksDispatcherOnMountWithHookTypesInDEV = {
     readContext<T>(context: ReactContext<T>): T {
@@ -4343,17 +4331,14 @@ if (__DEV__) {
       updateHookTypesDev();
       return mountRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      updateHookTypesDev();
+      return mountEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (HooksDispatcherOnMountWithHookTypesInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        updateHookTypesDev();
-        return mountEvent(callback);
-      };
-  }
 
   HooksDispatcherOnUpdateInDEV = {
     readContext<T>(context: ReactContext<T>): T {
@@ -4510,17 +4495,14 @@ if (__DEV__) {
       updateHookTypesDev();
       return updateRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      updateHookTypesDev();
+      return updateEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (HooksDispatcherOnUpdateInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        updateHookTypesDev();
-        return updateEvent(callback);
-      };
-  }
 
   HooksDispatcherOnRerenderInDEV = {
     readContext<T>(context: ReactContext<T>): T {
@@ -4677,17 +4659,14 @@ if (__DEV__) {
       updateHookTypesDev();
       return updateRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      updateHookTypesDev();
+      return updateEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (HooksDispatcherOnRerenderInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        updateHookTypesDev();
-        return updateEvent(callback);
-      };
-  }
 
   InvalidNestedHooksDispatcherOnMountInDEV = {
     readContext<T>(context: ReactContext<T>): T {
@@ -4868,18 +4847,15 @@ if (__DEV__) {
       mountHookTypesDev();
       return mountRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      warnInvalidHookAccess();
+      mountHookTypesDev();
+      return mountEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (InvalidNestedHooksDispatcherOnMountInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        warnInvalidHookAccess();
-        mountHookTypesDev();
-        return mountEvent(callback);
-      };
-  }
 
   InvalidNestedHooksDispatcherOnUpdateInDEV = {
     readContext<T>(context: ReactContext<T>): T {
@@ -5060,18 +5036,15 @@ if (__DEV__) {
       updateHookTypesDev();
       return updateRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      warnInvalidHookAccess();
+      updateHookTypesDev();
+      return updateEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (InvalidNestedHooksDispatcherOnUpdateInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        warnInvalidHookAccess();
-        updateHookTypesDev();
-        return updateEvent(callback);
-      };
-  }
 
   InvalidNestedHooksDispatcherOnRerenderInDEV = {
     readContext<T>(context: ReactContext<T>): T {
@@ -5252,16 +5225,13 @@ if (__DEV__) {
       updateHookTypesDev();
       return updateRefresh();
     },
+    useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
+      callback: F,
+    ): F {
+      currentHookNameInDev = 'useEffectEvent';
+      warnInvalidHookAccess();
+      updateHookTypesDev();
+      return updateEvent(callback);
+    },
   };
-  if (enableUseEffectEventHook) {
-    (InvalidNestedHooksDispatcherOnRerenderInDEV: Dispatcher).useEffectEvent =
-      function useEffectEvent<Args, Return, F: (...Array<Args>) => Return>(
-        callback: F,
-      ): F {
-        currentHookNameInDev = 'useEffectEvent';
-        warnInvalidHookAccess();
-        updateHookTypesDev();
-        return updateEvent(callback);
-      };
-  }
 }
diff --git a/packages/react-reconciler/src/ReactInternalTypes.js b/packages/react-reconciler/src/ReactInternalTypes.js
index ce22050123c..d12c1e38694 100644
--- a/packages/react-reconciler/src/ReactInternalTypes.js
+++ b/packages/react-reconciler/src/ReactInternalTypes.js
@@ -409,8 +409,7 @@ export type Dispatcher = {
     create: () => (() => void) | void,
     deps: Array<mixed> | void | null,
   ): void,
-  // TODO: Non-nullable once `enableUseEffectEventHook` is on everywhere.
-  useEffectEvent?: <Args, F: (...Array<Args>) => mixed>(callback: F) => F,
+  useEffectEvent: <Args, F: (...Array<Args>) => mixed>(callback: F) => F,
   useInsertionEffect(
     create: () => (() => void) | void,
     deps: Array<mixed> | void | null,
diff --git a/packages/react-reconciler/src/__tests__/useEffectEvent-test.js b/packages/react-reconciler/src/__tests__/useEffectEvent-test.js
index f263c9af269..2b5af2206b9 100644
--- a/packages/react-reconciler/src/__tests__/useEffectEvent-test.js
+++ b/packages/react-reconciler/src/__tests__/useEffectEvent-test.js
@@ -53,7 +53,6 @@ describe('useEffectEvent', () => {
     return <span prop={props.text} />;
   }
 
-  // @gate enableUseEffectEventHook
   it('memoizes basic case correctly', async () => {
     class IncrementButton extends React.PureComponent {
       increment = () => {
@@ -129,7 +128,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it('can be defined more than once', async () => {
     class IncrementButton extends React.PureComponent {
       increment = () => {
@@ -191,7 +189,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it('does not preserve `this` in event functions', async () => {
     class GreetButton extends React.PureComponent {
       greet = () => {
@@ -241,7 +238,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it('throws when called in render', async () => {
     class IncrementButton extends React.PureComponent {
       increment = () => {
@@ -275,7 +271,6 @@ describe('useEffectEvent', () => {
     assertLog([]);
   });
 
-  // @gate enableUseEffectEventHook
   it("useLayoutEffect shouldn't re-fire when event handlers change", async () => {
     class IncrementButton extends React.PureComponent {
       increment = () => {
@@ -375,7 +370,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it("useEffect shouldn't re-fire when event handlers change", async () => {
     class IncrementButton extends React.PureComponent {
       increment = () => {
@@ -474,7 +468,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it('is stable in a custom hook', async () => {
     class IncrementButton extends React.PureComponent {
       increment = () => {
@@ -579,7 +572,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it('is mutated before all other effects', async () => {
     function Counter({value}) {
       useInsertionEffect(() => {
@@ -603,7 +595,6 @@ describe('useEffectEvent', () => {
     assertLog(['Effect value: 2', 'Event value: 2']);
   });
 
-  // @gate enableUseEffectEventHook
   it("doesn't provide a stable identity", async () => {
     function Counter({shouldRender, value}) {
       const onClick = useEffectEvent(() => {
@@ -642,7 +633,6 @@ describe('useEffectEvent', () => {
     ]);
   });
 
-  // @gate enableUseEffectEventHook
   it('event handlers always see the latest committed value', async () => {
     let committedEventHandler = null;
 
@@ -692,7 +682,6 @@ describe('useEffectEvent', () => {
     expect(committedEventHandler()).toBe('Value seen by useEffectEvent: 2');
   });
 
-  // @gate enableUseEffectEventHook
   it('integration: implements docs chat room example', async () => {
     function createConnection() {
       let connectedCallback;
@@ -781,7 +770,6 @@ describe('useEffectEvent', () => {
     );
   });
 
-  // @gate enableUseEffectEventHook
   it('integration: implements the docs logVisit example', async () => {
     class AddToCartButton extends React.PureComponent {
       addToCart = () => {
diff --git a/packages/react-server/src/ReactFizzHooks.js b/packages/react-server/src/ReactFizzHooks.js
index 119c2a0778f..24e676fc710 100644
--- a/packages/react-server/src/ReactFizzHooks.js
+++ b/packages/react-server/src/ReactFizzHooks.js
@@ -38,7 +38,6 @@ import {
 } from './ReactFizzConfig';
 import {createFastHash} from './ReactServerStreamConfig';
 
-import {enableUseEffectEventHook} from 'shared/ReactFeatureFlags';
 import is from 'shared/objectIs';
 import {
   REACT_CONTEXT_TYPE,
@@ -833,6 +832,7 @@ export const HooksDispatcher: Dispatcher = supportsClientAPIs
       useHostTransitionStatus,
       useMemoCache,
       useCacheRefresh,
+      useEffectEvent,
     }
   : {
       readContext,
@@ -858,12 +858,9 @@ export const HooksDispatcher: Dispatcher = supportsClientAPIs
       useOptimistic,
       useMemoCache,
       useCacheRefresh,
+      useEffectEvent,
     };
 
-if (enableUseEffectEventHook) {
-  HooksDispatcher.useEffectEvent = useEffectEvent;
-}
-
 export let currentResumableState: null | ResumableState = (null: any);
 export function setCurrentResumableState(
   resumableState: null | ResumableState,
diff --git a/packages/react-server/src/ReactFlightHooks.js b/packages/react-server/src/ReactFlightHooks.js
index ed369be0e9b..d814de46298 100644
--- a/packages/react-server/src/ReactFlightHooks.js
+++ b/packages/react-server/src/ReactFlightHooks.js
@@ -17,7 +17,6 @@ import {
 } from 'shared/ReactSymbols';
 import {createThenableState, trackUsedThenable} from './ReactFlightThenable';
 import {isClientReference} from './ReactFlightServerConfig';
-import {enableUseEffectEventHook} from 'shared/ReactFeatureFlags';
 
 let currentRequest = null;
 let thenableIndexCounter = 0;
@@ -101,10 +100,8 @@ export const HooksDispatcher: Dispatcher = {
   useCacheRefresh(): <T>(?() => T, ?T) => void {
     return unsupportedRefresh;
   },
+  useEffectEvent: (unsupportedHook: any),
 };
-if (enableUseEffectEventHook) {
-  HooksDispatcher.useEffectEvent = (unsupportedHook: any);
-}
 
 function unsupportedHook(): void {
   throw new Error('This Hook is not supported in Server Components.');
diff --git a/packages/shared/ReactFeatureFlags.js b/packages/shared/ReactFeatureFlags.js
index ebb287568af..587e4e6a1da 100644
--- a/packages/shared/ReactFeatureFlags.js
+++ b/packages/shared/ReactFeatureFlags.js
@@ -118,8 +118,6 @@ export const enableCPUSuspense = __EXPERIMENTAL__;
 // Test this at Meta before enabling.
 export const enableNoCloningMemoCache: boolean = false;
 
-export const enableUseEffectEventHook: boolean = true;
-
 // Test in www before enabling in open source.
 // Enables DOM-server to stream its instruction set as data-attributes
 // (handled with an MutationObserver) instead of inline-scripts
diff --git a/packages/shared/forks/ReactFeatureFlags.native-fb.js b/packages/shared/forks/ReactFeatureFlags.native-fb.js
index d9a91f8a808..e2674b70fee 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-fb.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-fb.js
@@ -64,7 +64,6 @@ export const enableTaint: boolean = true;
 export const enableTransitionTracing: boolean = false;
 export const enableTrustedTypesIntegration: boolean = false;
 export const enableUpdaterTracking: boolean = __PROFILE__;
-export const enableUseEffectEventHook: boolean = true;
 export const retryLaneExpirationMs = 5000;
 export const syncLaneExpirationMs = 250;
 export const transitionLaneExpirationMs = 5000;
diff --git a/packages/shared/forks/ReactFeatureFlags.native-oss.js b/packages/shared/forks/ReactFeatureFlags.native-oss.js
index fa8f336c03f..672c3755108 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-oss.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-oss.js
@@ -51,7 +51,6 @@ export const enableSuspenseCallback: boolean = false;
 export const enableTaint: boolean = true;
 export const enableTransitionTracing: boolean = false;
 export const enableTrustedTypesIntegration: boolean = false;
-export const enableUseEffectEventHook: boolean = true;
 export const passChildrenWhenCloningPersistedNodes: boolean = false;
 export const renameElementSymbol: boolean = true;
 export const retryLaneExpirationMs = 5000;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
index acf3847bd06..67c08d94367 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
@@ -32,7 +32,6 @@ export const disableTextareaChildren: boolean = false;
 export const enableSuspenseAvoidThisFallback: boolean = false;
 export const enableCPUSuspense: boolean = false;
 export const enableNoCloningMemoCache: boolean = false;
-export const enableUseEffectEventHook: boolean = true;
 export const enableLegacyFBSupport: boolean = false;
 export const enableMoveBefore: boolean = false;
 export const enableHiddenSubtreeInsertionEffectCleanup: boolean = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js
index 5d3a5513018..a0ee01baa7d 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js
@@ -49,7 +49,6 @@ export const enableTaint = true;
 export const enableTransitionTracing = false;
 export const enableTrustedTypesIntegration = false;
 export const enableUpdaterTracking = false;
-export const enableUseEffectEventHook = true;
 export const passChildrenWhenCloningPersistedNodes = false;
 export const renameElementSymbol = false;
 export const retryLaneExpirationMs = 5000;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
index 553be202c45..058fd752d6e 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
@@ -34,7 +34,6 @@ export const disableTextareaChildren: boolean = false;
 export const enableSuspenseAvoidThisFallback: boolean = true;
 export const enableCPUSuspense: boolean = false;
 export const enableNoCloningMemoCache: boolean = false;
-export const enableUseEffectEventHook: boolean = true;
 export const enableLegacyFBSupport: boolean = false;
 export const enableMoveBefore: boolean = false;
 export const enableHiddenSubtreeInsertionEffectCleanup: boolean = true;
diff --git a/packages/shared/forks/ReactFeatureFlags.www.js b/packages/shared/forks/ReactFeatureFlags.www.js
index 87801a9658f..0752f266afc 100644
--- a/packages/shared/forks/ReactFeatureFlags.www.js
+++ b/packages/shared/forks/ReactFeatureFlags.www.js
@@ -49,7 +49,6 @@ export const enableUpdaterTracking = __PROFILE__;
 export const enableSuspenseAvoidThisFallback: boolean = true;
 
 export const enableCPUSuspense: boolean = true;
-export const enableUseEffectEventHook: boolean = true;
 export const enableMoveBefore: boolean = false;
 export const disableInputAttributeSyncing: boolean = false;
 export const enableLegacyFBSupport: boolean = true;