Given the status of "certified drivers" in Wayland due to their closed-source nature, either RedHat is giving up their graphic workstation business, or removing xorg won't happen any release soon.
RHEL 9 will be supported for ~10 years, but RHEL is scheduled to come out in ~3 years. Fedora will probably still support it and I would bet some of the RHEL rebuilds will too.
But RHEL didn't even set a date for removing Xorg support so it will probably stick around for a long while.