There are still things that work on X11 that don’t work on Wayland but Wayland has more security, more features and is actually being developed now.
Pick your distros default, if something graphical doesn’t work switching might do the trick.
Common issues with wayland are mostly related to screen sharing or lower level thingies like programmatically pressing the mouse.
Common issues with X11 is VRR, HDR, fractional scaling and multi monitor configuration.

















*shocked pikachu