How many homepods I can connect in the multi room mode?

I don't know if there is a specific limit. I've had a mix of five playing simultaneously. 1 x OG HomePod, 1 x New HomePod and 3 x HomePod mini.

tt2

I can play to all 9;

4 OG

2 Gen 2

3 Minis …… in 5 Rooms