Reset Screen Settings - Among Us
To reset screen resolution settings for Among Us - Windows version, you'll need to delete some settings in the registry.
Using regedit, navigate to HKEY_CURRENT_USER\Software\Innersloth\Among Us , then delete any ScreenManager setting
If AmongUs is running on the wrong monitor, delete the UnitySelectMonitor entry as well.
Do all this when AmongUs is not running.