Mini Media Player Groups

Good Day everyone,

I have installed Mini Multi media player. I have 2 sonos 5 Speakers. 1 in the kitchen and 1 in the living room.

This is what it looks like.
Screenshot 2023-02-19 191315

I am not getting the desired effect of Speaker management like in the docs.
I would to be able to group, ungroup, change the volumes individually like in the doc gif.