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.
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.