Pebble uses DID protocol which is present.
But i already reported that Rockbox pool (thanks Wasman) shortly picks up the Pebble on connect but looses it 3 sec afterwards.

For other applications like headset the audio sink protocol is missing.
I am willing to do "things" if i get clear instructions but my attempts to add protocols have failed as of yet.
Might it be possible to steal bt configs from XA2 or similar?