I am on DOS2 and still haven’t removed the dialog in my system. It provides Airplay functionality to my older Phantom, but is also available in the DOS2/Devialet app as an input.
They are set up as a pair in the devialet app, but I assume if I added a third, and set it as a separate room in the Devialet app settings, that I could run them as a group in Roon via AirPlay.
Note despite using the optical out on the phantom, that in the Roon audio settings, each speaker also appears as an Airplay speaker source I could enable. It’s using the room set up in Devialet as the source name so in this set up even though each speaker appears as a separate item, enabling either one sends a signal to the stereo pair. In this way I assume if I had two different rooms set up in Devialet, I could enable both as airplay sources in Roon, and group them.