I have nearly zero problems with multi monitor setups under Wayland. I did experiment my monitors rearranging themselves once, and there was an interesting glit

I have nearly zero problems with multi monitor setups under Wayland. I did experiment my monitors rearranging themselves once, and there was an interesting glitch regarding maximizing windows in displays that aren't horizontally aligned (that is now fixed), but beyond that I cannot recall any issues ever with Wayland multi display.