There’s no answer for this. Toyota purposely has been late to the game with adding CarPlay, which the Avalon was the first to receive it. They weren’t keen on adopting CarPlay in the first place, which they wanted to continue to use EnTune as much as possible. If there was one auto manufacture that is the most stubborn when it comes to CarPlay, undoubtably has to be Toyota, being that most of the other car manufacturers have been implementing CarPlay years back.