That is not true, no app ever gets to interact with the notch on macOS.

If you're in desktop mode, it's reserved for the menu bar. No application can go above that line.

If you're in fullscreen mode, the screen does not render anything to pixels at or above the notched area judging by what early reviewers are saying. In other words, it all goes black and the notch "disappears," with content displaying in a rectangular area.

https://www.macrumors.com/2021/10/18/macos-hides-notch-on-ne...

The iPhone is the only Apple device where app developers need to take into account a notch and home bar safe area.