Sorry for not correcting back here...
I apologized on discord and in Adams Pro¹ telegram for the false claim already.
No idea what exactly happened but it only worked once right on the evening adam was testing and i updated multiple times that evening and i am not sure anymore if it even did like expected or i did not grasp it at that time. Sry for the confusion...

Call audio is not routed through BT correctly.
All other BT features work.

Since all profiles are in place now after adams last round of fixes and get registered with the device on connect, my suspicion is the problem is BT + ofono related.