Apparently Google wanted too much info such as data from engine sensors which is why Porsche doesn’t offer it. Apple just cares if the car is moving for Apple CarPlay. (https://gizmodo.com/google-swears-andro ... 1735185946)
Toyota cites privacy reasons but rumour has it that they reached an agreement with Google and may be coming to Toyota in the future. Still don’t see Toyota listed in the Android Auto vehicle list though.