Follow up. This is not the case. Moving the phone closer does not help. So it seems that CarPlay is not determining the correct levels for the car-centric microphone hardware and the phone microphone is indeed not still being engaged.Yeah, I'd be interested in the results here.
I suspect the microphone is not being engaged by CarPlay in the car hardware and is utilizing the phone microphone still. I've noticed when I pick up the phone closer to me the person on the receiving end of the call hears me better. Anyone with that same experience?