I'm a bit out of the loop on RHEL, but a large reason for the specific kernel versions is to maintain API/ABI compatibility.

One of the reason, at the place were we ran about 100's of RHEL/CentOS instances, he stayed with RHEL-ish installs was to maintain API compatibility through out the lifecycle of the OS version.

I've now moved on to places were that isn't that specific need. But I still have a few smaller projects that I use RHEL/CentOS/Rocky/etc. because of the stability that those built into the releases.