Verified with cluster-bot cluster with PR 423 and 424 (launch 4.9-ci,openshift/cloud-credential-operator#423,openshift/cloud-credential-operator#424 aws)

1. Check pod-identity-webhook pod log, no "Error fetching secret"  
W1124 06:25:55.267947       1 client_config.go:615] Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.
I1124 06:25:55.271611       1 main.go:191] Creating server
I1124 06:25:55.272333       1 main.go:211] Listening on :9999 for metrics and healthz
I1124 06:25:55.272695       1 main.go:205] Listening on :6443

2. Check creationTimestamp of secret pod-identity-webhook is before that of "Creating server" in log  
oc get secret pod-identity-webhook -n openshift-cloud-credential-operator -o yaml
  creationTimestamp: "2021-11-24T06:25:48Z"

3. Check the volume for secret pod-identity-webhook in pod yaml  
oc get pod pod-identity-webhook-57bcfb74c5-r6fj5 -n openshift-cloud-credential-operator -o yaml
  volumes:
  - name: webhook-certs
    secret:
      defaultMode: 420
      secretName: pod-identity-webhook

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.9.11 bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:5003