For your information, Move Gen 1 only supports Bluetooth OR Wifi. The mode must be switched. Grouping is therefore not possible when streaming via Bluetooth. Roam, Era or Move Gen 2 are suitable for this. See also: "Share audio in Bluetooth mode with your Sonos system" on the Sonos website https://support.sonos.com/de-ch/article/share-roam-s-bluetooth-audio-with-your-sonos-system