Looking at the picture, the headunit is trying to start CarPlay. If this were a FeC issue, I would expect a message saying contact a dealer.
Bored of guessing now given this thread started two months ago!
Find a friend(s) with an iphone and a working CarPlay enabled car...
You can then try all combinations to narrow this down:
- Your car, your phone, your cable
- Your car, your phone, their cable
- Your car, their phone, your cable
- Your car, their phone, their cable
- Their car, your phone, your cable
- Their car, your phone, their cable
- Their car, their phone, your cable
- Their car, their phone, their cable
That will tell you exactly where your problems is likely to be...
Alternatively, maybe try a headunit firmware update but I'd be surprised.
Not much more I can add.