https://www.engadget.com/2197854/why-car-manufacturers-ditching-android-auto-explained/

So they can spy on you more. They don't want to be locked out of certain data streams and people who use android give up a ton of information to Google and other apps. But crucially a lot of that data isn't shared with the head unit and the TCM.

That means those automakers don't get that telemetry data and they want it.

Apple users are more likely to pass on a vehicle that doesn't have Apple Car Play than Android users are to pass on one that doesn't have Android Auto.