Alright so after seeing your comment I decided to give it another try.
I’m running Plasma 5.27.7 which is what came when I installed when I grabbed EndeavourOS. But it doesn’t come with the Wayland session included so I grabbed plasma-wayland-session from the AUR, And same issue as last time I can’t launch it from the login screen.
I know people have gotten it working fine but on my hardware for whatever reason I’ve had little luck.
When I tried Wayland on Gnome using my RTX3080 it either wouldn’t load into desktop or if I did it would lead to a bunch of visual glitches.
Haven’t tried it through KDE yet tho as it requires some backend hackery to even allow you enable Wayland with an Nvidia card.
Edit: So some people have been able to get Wayland working on Nvidia fine so it’s worth trying out yourself, Tho I’ve personally not had any luck.
Even though I don’t have much interest in the Steam Deck itself, seeing the quick progress of Proton and games I regularly play working on the Deck is what got me to seriously consider Linux and finally switch my desktop over.
Been daily driving EndeavourOS for over a month now and no regrets.