The target documentation is the below in 1.3. Red Hat Ceph Storage compatibility.

RHOSP 17.1 supports Red Hat Ceph Storage 6 for new deployments. RHOSP 17.1 only supports Red Hat Ceph Storage 5 in deployments upgrading from RHOSP 16.2 and Red Hat Ceph Storage 4.

The above statements are not clear for our customers.
They are confusing if we must upgrade Ceph Storage nodes to the latest major RHEL release or we should keep RHEL9.2 or not.

I discussed this topic with a Software Engineer in the rhos-tech.
And I understand we can keep the RHEL as RHEL9.2 on Ceph Storage nodes after the discussion.

I'd like you to make these documentations more clearly.