If you don’t mind challenges, FromSoftware titles are pretty decent, Elden Ring is a big as time sink, my first playthrough was about 120h.
Skyrim with a buncha mods is always a thing, you can get many replays out of that.
If you like story driven games you can always go for RPGs. I like JRPGs the most, the final fantasy series is pretty good, final fantasy 9 is my favourite.
Why isn’t wayland recommended for gaming? I just bought myself 2 screens, both of different resolutions and framerates, and as far as I’m aware x11 will set both to the same one because it doesn’t support different ones.