See https://support.sonos.com/en-in/article/set-up-sonos-voice-control:

“You can activate Sonos Voice Control and Amazon Alexa on the same speaker. While you can’t activate Sonos Voice Control and the Google Assistant on the same speaker, you can activate the Google Assistant on a different speaker in the same system.”

Ok great now I'm trying to pair my m9ve 2 and roam 2.  I tried to do it from the app but not working.  Can u help me with that if u kno

So can you confirm the Roam 2 works with Google Assistant? Sonos’ website has no mention of assistant for Roam 2, but Roam 1 does. Sonos support told me it was going to be a future update.