I am unable to get my iPhone 15 to charge from the USB port on my '19 FTR. The iPhone 15 uses a USB-C plug. I've tried using the Apple cord with a USB-C adapter with no luck. I've also purchased cords that have USB and USB-C connectors. Also to no avail. These cords , w/wo, adapter, charge my phone from the USB port on my desktop computer. For reference I have the same problem with the USB outlet on my KTM 790. Any thoughts?