The system in my car (2018 Ford Fiesta) will play mp3s from a usb stick but, as with your experience, it has only a basic understanding of ID3. It completely ignores the "position in media set" tag, for example, meaning that it plays the 1st track from each cd in a set, then all the second tracks, etc.

I wrote [1] to post-process my (slightly obsessively) neatly tagged mp3 collection for use in my car.

[1] https://github.com/andyjohnson0/ID3Minimiser

Obligatory note: destructively edits tags, so run it on a copy of any mp3 files.