Sonos One not showing as AirPlay

Nucleus-Naim Nova- 2x Naim muso - Sonos One

I used to group all these together as Airplay, but now Sonos One is not showing up as airplay option any longer. I have reset Nucleus and Sonos, but still no luck. It does show up in “Other network devices” as “via Sonos streaming” so I can play through it individually.

How can I get it to show up as an Airplay please?