AirPlay 2 now available, ask Siri to play music on your Sonos smart speakers

Sonos has taken pains to ensure that it's smart speaker line up can work with various partners. The Sonos One and Sonos Beam already work with Amazon Alexa out of the box.
Now that Apple's AirPlay 2 standard has been made available, users of iPhones and iPads can also use their Sonos speakers.
I've tested AirPlay 2 on some Sonos speakers by setting up the Sonos app on my iPhone. Suddenly I see some of my recent Sonos speakers appearing as AirPlay 2 compatible. This allows me to quickly route audio from my iPad or iPhone to any of these nearby smart speakers.