Your comments

I just saw a Conversation about Admin seeing all teams, my proposal is to have all Teams visible for all Members (why not?). May be to have an option when starting a team to have that team 'non visible'. Of course, seeing the chats inside a team is only visible for the Team members!

Especially in the beginning, it is important that you can receive ALL notifications of Chat messages in a team!

I think I was not clear enough.

My point was to have an option to make Teams visible that you are not a member of. So in that way it is for every member visible that such a Team is available, and that they can join if they want to.