Anything that's GTK and Qt based will definitely be Wayland native and thus not have the XWayland issue with fractional scaling. So Libreoffice works fine and so does gnome-terminal. I use those daily. If you have problems with those there's something else wrong.

For the other examples it's probably XWayland scaling at 1x and then being scaled up instead of 2x and down. The patches to fix that exist but I'm not sure where they're already merged in. All those apps except Emacs should go Wayland native in the next few months though.