Just iPhone 13 max pro not working with aux

Hi Sky_Walker_,

For help with connecting an iPhone to a car, test the steps below found in the article here: How to connect your iPhone, iPad, or iPod touch to your car - Apple Support

"Connect using USB playback

1. Restart your device and your car.
2. Make sure that your device is unlocked and on the Home screen.
3. If possible, try to connect using another cable or USB port. Check the manual that came with your car to learn how to connect an Apple device.
4. Check your charging port for any debris or damage. Make sure that your charging cable is properly inserted into the port.
5. Update your device.
6. Make sure that your stereo is using the latest firmware from the car manufacturer. Check your car's manual for more information.
7. Try playing audio from a different app. If you can't play audio from a third-party app, contact the app developer for help. If you can't play audio from an Apple app, contact Apple Support."

If the issue continues, and if you've checked the charger port for debris and tested with a different cable to be sure, reach out to Apple Support directly to further assist.

Contact - Official Apple Support

Contact Apple for support and service - Apple Support

Best.