MS Teams capabilities and external access

MS Teams as collaboration hub exhibits in its total set of capabilities differences wrt external access; some minor, some significant. Overview of my current understanding:

Teams capability	External access options
Chat and Calls	Teams Federation Teams Guest Access
Meeting	Anyone can be invited on own email Lobby function for controlled entrance in the meeting
Live Event; audience	Teams Federation Teams Guest Access Full anonymous
Live Event; presenter	Teams Guest Access
Teams instance	Teams Guest Access