Can I create a breakout room and have breakout rooms in a room?
No, you can't. You can only create breakout room in Teams meeting. In my experience, the latest features can meet your requirements well.
To turn on the break rooms feature, please make sure you are the meeting organizer and all participants are using the latest version of Teams. Once the meeting has started, you can select the breakroom icon and choose the number of breakout rooms you want to create and how participants will be assigned. For more details about it, you can refer to:
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