I currently run EndeavourOS with Plasma 5.27 (whatever the previous latest is) on X11. It works really really well, I have no issue with X11 as it works like a charm. Will I be forced to use wayland when upgrading to v6?
So if you want to try it out. Get the branched Fedora release. Note: Currently pre-beta by about a week. At own risk.
Also some good stuff with AMD support and Wayland too.
Any time you want to leap on early the Fedora branched release is available and with update policy that will become beta and then stable Fedora 40 automatically.