Teams: Allow Screen Sharing
Navigate to System Preferences, and select Security & Privacy.
In the Privacy tab, scroll down on the left sidebar and select Screen Recording. To edit app permissions, click on the lock on the bottom left and enter your laptop password when prompted.
Once unlocked, select Microsoft Teams on the right panel.
Once selected, you can close out the System Preferences window. It is recommended to restart your Teams application by navigating to Microsoft Teams > Quit Microsoft Teams and relaunching.