Sure they support both X11 and Wayland for NOW.

KDE soon won't, and that's the one we use.

Gnome I got no clue, we don't use Gnome.

Cinnamon is likely to be alright and supporting X for a good while.

Also like... "but that's not STANDARD!" is literally my entire point. That's the problem. "That's not a standard use case" being used as basically a "go fuck yourself, you don't matter". (You might not be implying this, but a lot of people sure do.)

Linux should support the weird stuff too. "That's not a standard use case" could be used to reject just about anything you don't like, even, say, custom fonts.