Removing it in full screen ought to be the easy fix for Apple. By the time you've started the app and are done fiddlign with it while setting it up for production use, it should no longer be a surprise that it's using the mic.
Also, AFAIK apps don't use to autostart in full screen (might even be against design guidelines) so there should always be an opportunity to notice any spying in time.
https://developer.apple.com/forums/thread/693969
Removing it in full screen ought to be the easy fix for Apple. By the time you've started the app and are done fiddlign with it while setting it up for production use, it should no longer be a surprise that it's using the mic.
Also, AFAIK apps don't use to autostart in full screen (might even be against design guidelines) so there should always be an opportunity to notice any spying in time.