This seems to be true. However, looking at https://rockylinux.org/news/rocky-linux-9-2-ga-release:

9.2 Release for PowerPC (ppc64le) architecture held back

During testing, we discovered an architecture-specific issue on ppc64le systems with the bundled version of Python 3.9. This issue not only prevents installing, but may break existing installations.

This issue is reproducible on CentOS Stream 9 and RHEL 9.2. We have opened a bug report upstream at rhbz#2203919 and are working to fix the issue.

Seems like they hold back releases to do additional testing. In this case, they avoided a bug that was present on RHEL (and presumably AlmaLinux).