Marantz SR7015 Maxi Media Player

Hello, i’m new to home assistant and want to achief something but i can’t get it working.

I use the Maxi Media Player on my Dashboard, and want to have a group option to add zone 2 and 3.

I have a friend who is using Sonos with the Sonos card,

where you can select multiple speakers, i hope something similar is possible with zones on Marantz/ Heos.