I had repeated issues with the resolution in this game.
The settings and other displays would displays "outside" the game window were it is not visible or accessible with the mouse.

To get it back in view you can change the UI scale using + or - if you have a number pad.
You can also use Shift to get the + or - if you don't have a number pad.

This works in the Maine menu, settings and in game.

This link as a few other resolution fixes.
https://steamhost.cn/steamcommunity_com/app/671440/discussions/1/1693785669867329158/

Changing the resolution in the steam start option did not work for me. So I had to find a different solution.

It took me a bit of time to find this solution so that's why I am posting it.
If this helps even just one person then I happy!