macOS Monterey 12.1 Beta: How to Share Your Screen on a FaceTime Call

In macOS Monterey 12.1, which is available in a beta capacity right now, Apple introduced its new SharePlay feature to FaceTime. Previously only available on iPhone and iPad, SharePlay allows you to share your Mac's screen with other people on a FaceTime call, which opens up new possibilities for sharing experiences with friends, family, and co-workers.
Thanks to SharePlay, you and others on the same FaceTime call as you can listen to music or watch TV movies and shows together. You can even sha