Hi
I can tell you now, that this Frames exchanged by the NI Session via BLE, are very specific.
I do know now how they are constructed, but not from Qorvo.
I had to by an Evaluation Kit from NXP for a good amount o money to get this Info.
Unfortuanatly, I can´t share the frame info, because it is under NDA…
I must say I really hate this proprietary crap from Apple, that you have to pay a lot of money to get to those informations, or otherwise nobody is allowed to tell you something…