Can’t Play Music through USB

Hi, I have an iPhone 12 Pro Max (iOS 14.6) that has always played music perfectly through a USB cable plugged into my car’s port. A few days ago, this thing started happening where, when the phone is connected, to play music no audio comes out (even though the song says it is playing). It connects, shows that it’s charging and playing music, but nothing plays. I’ve restarted my phone, unplugged the USB, turned my car off and back on, messed with all volume settings, and nothing worked.. I have also changed cords and checked for debris. The port itself is working fine because it charges my phone. It’s also not my speakers because the radio works fine and I can connect an iPod with no issues. This is specific to my iPhone. If you could please help I’d really appreciate it!