Before trying another device -
- Do you hear sound from other apps when you connect your iPhone to your car stereo?
- No - tried spotify, apple music, tiktok, youtube, instagram
- Any issues with audio playing a song on your iPhone without it being connected to anything?
- No issues playing sound when connected to any other device or not connected at all
- Are other devices working without any issues when connected via USB to your car stereo?
- No - connected an iPhone 12 and it worked perfectly
NOW... I tried my iPhone 11 again after plugging in the 12.. and all apps listed above work again.
While this will probably not resolve ANY issues for any further individuals looking at a similar issue... my current issue is resolved (on it's own, with no real help from Apple - do better with your troubleshooting script, it should not take 3 questions to ask this level of detail)