Gamemode Steam launch options not working

I’ve tried variations of Steam launch commands but can’t seem to make it work. The game acts like it’s launching and then the button returns to “Play”.

Here are the launch commands that were suggestions to me in a previous thread:

This is for Gamemode:
gamemoderun gamescope –mangoapp -w 640 -h 380 -W 1920 -H 1080 -F fsr -f – %command%

Use this if you want Mangohud and Gamemode:
env MANGOHUD_CONFIG=”fsr,fps_value.gamemode” gamemoderun gamescope –mangoapp -w 640 -h 380 -W 1920 -H 1080 -F fsr -f – %command%

This is if you only want to enable FSR via desktop steam
WINE_FULLSCREEN_FSR=1 WINE_FULLSCREEN_FSR_MODE=ultra %command%

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also interested in the correct command line to use in steam. I also can get FSR to work. I have the same experience when trying to invoke gamemode via the game parameters in steam desktop