Yeah...
Asking Apple to turn itself off to use a Microsoft product!? How dare you! haha...
I'm no coder but I'm pretty sure there are permission things/restrictions happening there that prevent them from truly talking to each other. The only information I have seen shared in any vehicle so far is in the Navi turn by turn arrows and distance to turn do show up on the HUD. The distance to destination etc do not work in the gauge cluster however. You would think that being on the same screen they are related but that doesn't seem to be the case. When APC or AA are connected they were designed to fully take over. In my Audi you get full google maps in the gauge cluster. If I'm using AA and navigating the map disappears and is not even accessible. Remember both of these companies have been fixated on attracting customers and forcing them to stay within their ecosystem (especially Apple). They want you using their streaming services not radio... they want you using their map apps not factory navigation etc etc...
That is my uneducated tin foil hat wearing guess though...