It’s not that it does not work, you will be able to listen to music from a pendrive for instance… 3.4 is not compatbile with older hubs, your car from 2016 is an example…
Assuming there’s nothing wrong with your current hub and cabling, swapping the HUB for a CP compatible one should solve your issue.
You can take this post as a reference for part numbers → Media Hub, CarPlay Compatible - 2015-2020 Ford/Lincoln - SYNC 3