Bose SoundTouch Media Player to Apple HomeKit


The Bose SoundTouch Integration found all of my devices and provides the media_players for it which worked.
When I want to add them in the HomeKit integration (in accessory mode), then none of them got found (only my TV’s).
What was wrong here?

Could it be, that the HomeKit Bridge only supports the media_player with device class tv and receiver and not with speaker?