If you want to control your Sonos system using the Nest Hub Max, you'll need to use the Google Assistant app. Once you've opened the app, you'll need to select the "Control" icon in the top right corner. From there, you'll need to select the "Music" option. Then, you should see your Sonos system listed under the "Devices" section. Select your Sonos system and you'll be able to control it using the Nest Hub Max.
