Break out room

Hi guys, dunno if this been asked before

Lets just say that I have a room with a 100 participants inside

Then I wanna to break it into smaller 10 person room, but I only make 9 rooms, and the rest of 10 people stay in main rooms

Then I assign manually the 90 persons into 9  room.

lets just that, from 90 persons that I assign manually, half of it away from keyboard and never got into the room

after a while, I decide to call back all participant into main room. So I decide to close breakout room. after a while (1 minute?), everyone should be back. but in reality, not everyone back

the question is, is there a way to "force close" and pull everyone back, whether they away from keyboard or not

thanks