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.