This worked for me.
- Right click blank area of Desktop
- Select Display Settings
- click MultiTasking
- Set Virtual Desktops "On the taskbar, show windows that are open on" **** to Only the desktop I'm using
Or you can just put a piece of tape on your display. That hides it as well. You could also just switch to Linux. Ubuntu 22.04 gets updates until 2027, and has the additional feature of not having some pinhead tell me to take HOURS doing an in-place upgrade that also doesn't MITIGATE THE MICROSOFT BUG. Also, I am running the second to last version of MacOS on a 17 year old MacBook Pro, but I have lost faith in Apple providing pro level hardware to anyone without $5K laying around (as Apple inexorably heads toward making iPhones with lids as opposed to the affordable pro hardware I used forever.)