Why is there no screen projection after connecting to CarPlay?

[SanArthur]

"After connecting to CarPlay, but the car screen does not display, first check if there is any damage at the data cable connection point or if the plug is loose. CarPlay is an in-car system released by Apple Inc. in the United States, which seamlessly integrates users' iOS devices and iOS usage experience with the dashboard system. When connecting to CarPlay, first ensure that the car model supports CarPlay before proceeding with the connection. Prepare an original USB cable and connect it to the car's USB port. At this point, the car system will automatically open CarPlay. If the CarPlay interface does not appear on the car's main screen, click the CarPlay icon on the phone to launch CarPlay. The connection method for CarPlay is that users connect to the car via USB. After a successful connection, the screen will display a handshake between both parties, and then users can view the phone screen and use various functions of the iPhone without manual operation."