During the last upgrade window and 4.20 upgrade, we hade some strange issue with the Subscription of some operators not showing.
This continues - console for quay operator showing "No Operator Subscription",
Subscription is on stable-3.16 channel, but csv (and actual deployment) is still on 3.15
% oc get Subscription.operators.coreos.com -A | grep quay
openshift-operators quay-operator quay-operator redhat-operators stable-3.16
% oc get csv | grep quay
quay-operator.v3.15.2 Red Hat Quay 3.15.2 quay-operator.v3.15.1 Succeeded