To live stream and allow guest users in a meeting, do the following:
Click the meatballs menu icon( 3 dots) on the meeting screen and select Start live streaming.

A pop-up will appear where you can push the toggle button to allow external users to access the link and join the meeting. Then, copy the link of the meeting and share it with your external users.

Note:
- If the toggle is enabled and the link is shared, any user having the link can join the live stream.