A while back I wrote a script that allows you to report attendees of a Teams meeting with PowerShell:
I have now done a video here:
https://www.youtube.com/watch?v=M0GBzGT3Igk
to provide a walk through of what the execution of that script looks like. The script is located at:
https://github.com/directorcia/Office365/blob/master/tms-attend-get.ps1