For those doing apple lossless. Wireless CarPlay will still convert to lossy aac even though it is streaming via wifi not bluetooth. I believe this is done for reliability, performance and battery saving reasons.
To get lossless to the head unit you need to do wired carplay.
Just went into Ford Pass and it says I just got 3.5.2 today must have happened on the road because i have no significant data being consumed through wifi.