https://techcrunch.com/2021/10/05/co-streaming-rolls-out-to-all-creators-on-facebook-gaming/

Co-streaming is rolling out to all users on Facebook’s game-streaming platform Facebook Gaming. The feature will allow users to team up and stream with one another, while enabling viewers to navigate between co-streams and choose which perspective they’d like to see the action from.

The feature had previously only been available to streamers in the service’s partner program but is now seeing a wider release. The feature is currently limited to four co-streamers at one time.