I just wanted to circle back with a quick update on this thread to note that the Crunchy Postgres for Kubernetes v5.3.2 release has been verified for compatibility with both OpenShift v4.12 and v4.13.
For more details, please see the "Kubernetes Compatibility" section of the v5.3.2 documentation:
So assuming you are on the latest version of the operator (currently v5.3.2), you can now safely move forward with upgrading to the latest versions of OpenShift.
Additionally, its also worth mentioning that were are currently putting the final touches on the Crunchy Postgres for Kubernetes v5.4.0 release, which will soon be available, and will also include support for these versions of OpenShift (v4.12 & v4.13).
Thanks,