Answered
Reset Sonos Controller
Previous Sonos app has the option to reset Sonos controller. I used this feature to reconnect my Sonos speakers. I can not find this feature on the new Sonos app 10.4. To reconnect my Sonos, the new Sonos app asks me to go to the missing speakers to touch the setup button. The problem is I have more than 20 Sonos speakers missing. If Sonos removed the Reset Sonos Controller feature, they need to bring it back
