Allow screen sharing on macOS… After you have installed your third-party Screen Sharing app, like, GoToMeeting, Skype, zoom or others…
On Catalina 10.15 and later, you must Allow screen sharing
so colleagues using PCs, tablets and other devices, may see your screen.
Go to Apple Menu > System Preferences > Security and Privacy and intentionally ALLOW the third-party programs to see your Mac computer screen.
Click the lock in the lower left-hand corner, add your administrative username and password…
Select Screen Recording, and ‘Enable’ the screen sharing app.
Disable it when you’re done.
It’s in the list because you installed it earlier.
Why Screen Recording…? Consider that if someone may see your screen, you're also providing them them access to record your screen.
If you're simply sharing your screen, with someone using a program like Skype, ‘disable’ access in Accessibility, Files and Folders, or even Full Disk access.