could try this? not sure if it'll work.
https://stackoverflow.com/questions/68477371/force-unity-game-in-folder-to-run-w...
otherwise you might just have to stumble thru menus best you can. the resolution settings are in the Video settings tab. basically the only setting there. idk what your screen looks like, but if you can access that dropdown and scroll wayyyy way down and pick any random resolution that may work.
or, idk where unity stores PlayerPrefs, but if you can find it and edit it then that could work too.
anyway, sorry i dont have a more elegant solution to this. i'll see what i can do in the future to make it not happen again