General 500L usb no sound?

[Bugleuk]

Hi all, I have just purchased a twin air lounge Fiat 500L and am having trouble with the stereo producing no sound when connected via usb to my iPhone 11, all works fine via Bluetooth.
The music track etc is showing as playing but yet no sound, is a special usb needed?
Anybody any ideas

Also does anyone know if it’s possible to display the mph and mpg as I can only seem to display one or the other

Thanks