Default Audio Output

Hello there, I recently got myself the Sonos Roam SL speakers and I wanna set it up as a default audio output to my Apple TV, however, I cannot do it. Apple doesn’t allow me to set it up as a default one and I have to manually select it everytime I use the TV even though the speaker is always on.

I was thinking maybe to make an automation or do a shortcut, however, I’m kinda lost how.

I would appreciate any help on this 🙏🏻