Airplay Dvices not showing

I have a eight airplay devices which includes Apple TV’s, HomePod and Sonos speakers and only one devices shows up on the drop down menu from the speaker icon. Any help would be appreciated.

Stop Playing. Change your Airplay device on your Mac and you will see the choosen device in Audirvana.

Sorry for appearing stupid, where do I change my Airplay device on my Mac?

Click on the sound icon.

Same problem here.

Thanks to the instructions in this thread I have now one of my AirPlay devices showing in Audirvana.

How can I select more than one AirPlay speaker?
(I’d like to play music in multiple rooms)