After the Catalina upgrade I lost the screen sharing capabilities in all the apps that I used for screen sharing: MS Teams, Zoom, Lifesize, etc.
I'm familiar with the general procedure outlined in https://apple.stackexchange.com/a/384229/14844 and elsewhere.
However, the list of apps for "Screen Recording" permission is just completely empty. It appears as if the apps asking for such permission somehow fail to get themselves registered with macOS. I can start Zoom, hit screen sharing, hit the "Open System Preferences" button in its dialog but still see blank there. Same for the other apps.