Sonos Services for Symfonisk not populating using native integration

Attempting to utilize my Symfonisk Sonos speaker as part of a notifications system. The speaker was natively integrated and shows up under the Sonos integration with one entity; media_player:kitchen.

Based on the documentation found here, several services should be available like sonos.snapshot or sonos.unjoin, yet I don’t see them populated under the developer services tab and as predicted, can’t access them even if I try.

I would like to implement a TTS system like the one found here, but without the services, I’m dead in the water.

Any insight into the next step into unlocking these?

Thanks in advance!