Gamescope has some nice bug in the latest version, and at least the version before. Apparently my AMD GPU is too old already.
I was trying to use it because KDE wouldn’t put a game on the other monitor. Either a KDE or Wayland problem, or both.
I didn’t get another monitor to not use it for games. Kind of annoying.
Had to change Wurm Online to resizable window, to get it on the other monitor.
The newest version of Gamescope might work, but not available in openSUSE yet. Downgrading won’t be easy, you’ll have to find the old version somewhere. Too lazy to see if it’s cached.
Too lazy to compile it as well. If using Arch Linux, there might be an AUR package for the Git version.