I recently upgraded to Catalina(which I regret now). I have been facing lot of weird issues after upgrading one of which being not able to share the screen on Google Hangout Meet. I followed a few of the approaches mentioned in other forums.
The fix was simple where I have to go the System Preferences > Security and Privacy > Screen Recording and make sure Google Chrome is checked.
The issue for me, though, is that I am not seeing "Google Chrome" on the list when I go to the Screen Recording section and I have no idea how to make Google Chrome seen on the list. Can anyone help with this?