Gamescope session support

[Zetarancio]

As of right now method 2/3 is working for gamescope session under steamos like OSes such as bazzite/nobara/chimeraOS while method 1 is not (according to my experience with Ayaneo geek 1s and ho elitebook 1030g3). Unfortunately by doing so the internal display stays on during boot. Would it beneficial to run an export-gpu command after it? Maybe adding an entry point for custom command would cut it? I was experiencing with something along the lines of "if egpu is connected then run this script" but I had no success with a systemd service.