Hello, lachlan85. Thank you for posting your question to the Apple Support Communities. We’re happy to provide you with some helpful information about this CarPlay feature.
With Enhanced Integration enabled, your iOS device will be able to work quickly with your car’s audio system to identify which installed apps are compatible with CarPlay, and how to best display those apps on your car’s screen. This is an optional feature that you can enable as CarPlay will work similarly with this feature disabled.
We hope this answer helps to provide more clarity about this feature. Please let us know if we can help with anything else.
Cheers!