Ensure your app supports CarPlay and is approved by Apple for CarPlay use
Enable the CarPlay capability in your app’s Xcode project
Add the required CarPlay scene configuration to your app’s Info.plist
Implement the appropriate CarPlay templates and interfaces in your app
Test the app using the CarPlay simulator or a compatible CarPlay system
Submit the app to App Store Review with CarPlay functionality included
Install the approved app on an iPhone signed in with the same Apple ID
Connect the iPhone to a CarPlay-compatible vehicle or receiver
Open CarPlay on the vehicle display and use the app if it appears there