Hi Squint
I have the Apple iPhone XR and that works fine using car play but to begin with I couldn’t get it work and I looked on Google and saw a video where it said that Siri must be activated on the phone. No I never use Siri but once I activated it it all worked fine. But to make phone calls I have to ask Siri not press the voice activation button or don’t use car play and use the phone via Bluetooth.
Hopefully the dealers will be open soon to fix it for you. Xx
Apple car play