Operator service-ca is blocking cluster upgrade in RHOCP 4: service-ca does not have available replicas

Issue

Not able to proceed with cluster upgrade in RHOCP 4, service-ca operator it's in Progressing state with message:

$ oc get co service-ca -o yaml
apiVersion: config.openshift.io/v1
kind: ClusterOperator
metadata:
  name: service-ca
[...]
status:
  conditions:
  - lastTransitionTime: '2022-03-10T18:58:18Z'
    message: "Progressing: \nProgressing: service-ca does not have available replicas"
    reason: _ManagedDeploymentsAvailable
    status: 'True'
    type: Progressing

And upgrade status returns waiting on service-ca message:

$  oc get clusterversion
NAME     VERSION  AVAILABLE  PROGRESSING  SINCE  STATUS
version           True       True         4d     Working towards 4.9.23: 582 of 738 done (78% complete), waiting on service-ca