Messaging is missing from CarPlay. Unable to send or receive messages. Not even an option to add it to CarPlay. This is my most heavily used feature while I’m in the car.
If you have locked or hidden the Messages app (https://support.apple.com/guide/iphone/lock-or-hide-or-an-app-iph00f208d05/ios), this is expected. Locked and hidden apps are not available in CarPlay.