Hello Vicnicolas13,
Actually, your phone should be able to play downloaded music also. While other apps such at Safari etc. may not be compatible, if you have any purchased music, try downloading it, and testing if that plays.
Then we will know if it's an app issue, or iPhone, or connection issue.
Also, since this is a brand new phone and iOS version, you may need to try all the troubleshooting here, including checking for updates from the car manufacturer: How to connect your iPhone, iPad, or iPod touch to your car - Apple Support
"Connect using USB playback
- Restart your device and your car.
- Make sure that your device is unlocked and on the Home screen.
- 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.
- Check your charging port for any debris or damage. Make sure that your charging cable is properly inserted into the port.
- Update your device.
- Make sure that your stereo is using the latest firmware from the car manufacturer. Check your car's manual for more information.
- 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."
Thanks.