I think "most" are fixed. I use quotes because I've seen people say they have issues that I have never run into myself.

I'm currently stuck on Windows for some old school .NET work, but otherwise have been running Wayland on either arch or fedora for 8 or so years, no real problems specific to Wayland. With that said, I've also always had X to fall back to for the odd program that absolutely only worked in an X session. At this point, though, I don't even recall what they were (probably something that didn't like running under Swaywm because wlroots), so even that might not be an issue.