Screen sharing icon will not stay in menu bar
Previously, just before updating MacOS (I seem to have Big Sur 11.5.2 at the moment), the screen sharing icon was always visible on my menu bar, readily available for me to begin sharing via one of my several Apple TV devices. After an automatic update just recently, the screen sharing icon is no longer appearing on the menu bar unless I begin sharing first. I can access sharing via the Control Center icon, but this is an extra step. After I end sharing, the screen sharing icon disappears again. I have the "show mirroring options in menu bar when available" box checked under Display Preferences.
MacBook Pro 15″, OS X 10.11