Allow Screen Recording and Sharing on a Mac
To enable screen sharing on a Mac you need to adjust your Security and Privacy settings.
Open System Settings
Select Privacy & Security
Select Screen Recording
Select the checkbox next to the applications that you want to have access to record and share your screen. In most cases you'll choose Chrome, FireFox, KalturaCapture, Teams and Zoom
If you want to allow others to control your screen using these applications you may also need to go into "Accessibility" and set the same permissions there too.