AirPlay between Plex on Apple TV and Sonos move

Plex Players Streaming Devices
1

Server Version#:4.47.3
Player Version#:

Hello, im running Plex on Apple TV 4k, trying to connect and hear through Airplay to SONOS move, not working, switching to Bluetooth - works good.

The Apple TV - Sonos Move work with airplay on Apple Music for example

2

Not sure this is the same problem, but since updating my AppleTV (HD) a few weeks ago (Apple removed the Airplay Option out of the Settings-> Audio/Video Menu) I can not get Plex to play on the SYNFONISK / Sonos Airplay speakers anymore. Basically there is no option to tell the Plex App to play on AirPlay (as Netflix has for example).