I’m in this picture and I don’t like it

So they are happy?

So a win-win situation?

You can persist the session and use the link to it on the invite I think. The link is not protected however, anyone can use it but that never was an issue.

Check jitsi meet (meet.jit.si) It is a free service based on an open source framework and runs fine in a browser. I don’t know of it can handle 32 but during the pandemic it was used for online classes.