On my Iphone. I removed the music app. and was unable to play music in my car with the usb interface. It had no app to play from. VLC must use the music player in some way to play the audio. This is without carplay btw. Im pretty sure carplay is differnt.

Chrome for iPhone is also only allowed to be reskinned Safari.

It’s a locked-down platform - slightly less so if you’re in the EU.