MS Teams can be used to deliver live (synchronous) lectures up to groups of 250 participants. It now includes breakout room functionality, but it is not integrated into Sulis.
See the guide to use MS Teams Breakout rooms.
Full documentation about MS Teams and MS Teams Live Events is available in the ITD Topdesk
Learn more here about Delivering a lecture with MS Teams. Also, see this super-useful post: 3 Features to Help You Organise Your MS Stream Videos.
For groups of over 250, it is possible to stream a live lecture through MS Teams Live Events but this is designed as a broadcasting service with an in-built delay (e.g. similar as live television) and not for interactive teaching. Learn more: