This is a workaround in case something isn't operating correctly. I had my resolution set to the native steam deck resolution and it wasn't working at all. I even tried lower resolutions -- the only fix was the virtual desktop.
Just a heads up, I couldn't get the game launching by following any instructions or troubleshooting steps in this thread. In case somebody has the same issue I had (Launcher works, but game client closes immediately), here's what fixed it on my Steam Deck:
Grab the latest lutris-GE-Proton and...