Multiple Screens Connected On Full Screen

Why are the options for display only Windows options (Windows Fullscreen and Windows)? I run four screens simultaneously, and 70% of the time, I go to a different screen because Diablo 4 has no option for only one monitor. Is there an option that only plays on one screen and does not move to other screens? Many games have options only to detect one screen and not move to different screens. To play the game, I would have to unplug three other screens to only play on one screen to avoid going to another screen. If I am missing a setting, please let me know.