Have anyone an idea of how to reproduce this on a private instance, like in https://www.uni-muenster.de/IT/en/services/kommunikation/jitsi/anleitung.html ?
“If you want to have a password protected conference room for regular appointments (e.g. team meetings), enter “/persist” in the chat of the room. You will receive the confirmation “Successfully persisted room”. If you later create a conference room with the same name, the original room is opened with the corresponding password. If you no longer need the conference room in the long term, enter “/unpersist” in the chat area to unblock the room.”
This will sound obvious, but have you asked them ? Very interesting implementation, I also like their welcome page including guides for participants and moderators!
Asked them and i am still waiting for reply