Dougie, was the 16 pro changed USB C connection for charging/carplay, rather than the Apple proprietary connections seen on older iphones? The HS have USB A or USB C ports?
Yes, C-Port on the phone, A-Port on the car.
Looking around the internet, there seems a problem with the 16 or rather, it’s USB C port, with talk on buying a Lightning adaptor, or a USB data transfer cable… It’s best, I transfer you to Apple discussions thread (20+ pages), where you will hopefully will find a solution for you or you can join the conversation yourself.
Hold the line why I transfer you😂
https://discussions.apple.com/thread/253868999?answerId=257259744022&sortBy=rank#257259744022