Still working here. Does the speaker show up as a receiving device in the AirPlay 2 menu?
 

In the past, before the current iOS version, I have had to reboot my iOS device to get the Sonos to show up. If it didn’t, and it always has, I would have tried a power cycle of the speaker. It’s happened four times, three with my iPad, once with my iPhone. Each time, a reboot of iOS fixed it.  

By the way, there isn’t a Sonos 1 speaker. There’s a Sonos PLAY:1, which has never had AirPlay 2 capabilities, and the Sonos One, which does operate as an AirPlay 2 receiver, and can be grouped in the Sonos controller with any other Sonos speaker so as to “share” the AirPlay 2 signal.

See a great explanation of more differences here:

Sonos One vs. PLAY:1 reference.

The One is Airplay2 compatible, the Play:1 is not. 

I have the Sonos One and unplugging it as suggested worked. Thank you!