Oh nooo 😠I'm so gutted.
Did you see the fix I posted as a reply to your original post a few months ago? Maybe try that then.
Ah!
One of the solutions used launch options, which can be set in Steam if you right-click the game in your Library and go to Properties. If you're running the standalone game from itch though, I'm not sure how you'd do that.
Another solution was using PlayerPrefs which on Linux is stored in:
~/.config/unity3d/Matt Glanville/Switch 'N' Shoot