Breakout rooms in Zoom
To use the breakout room, you need to go to the web version, sign in, and click on Settings in the left side menu.
Scroll down until you find Breakout room on the meetings tab and tick to turn in on.
Tick all the options and click save.
After saving, you need to sign out from zoom and sign in again.
If you create any meeting and click on the three dots more option, you should have the breakout room now.
After clicking breakout room you should have this screen and you can manage all the rooms.