I got the Gemini on Android Auto update today. What I discovered was that Gemini could not start playback on Roon ARC like Google Assistant could. What happened when I said “Play songs by Dream Evil” was that I got a short pause in playback and then Roon ARC just continued to play the previous song. With Googe Assistant this worked. Are you going to incorporate Gemini?
I’m not sure that this shouldn’t have been a Support request because at least one other user reported Gemini to work in Android Auto at least partially.