Sorry to hear of your problem John and given all the hardware that's been replaced wonder if its a firmware issue.
It does seem to me more sensible for modern cars to just mirror your phone using for example Andoid auto. I know this is what the Kia Niro range offer and likely many others. Why try to reinvent the wheel by having standalone bespoke systems when familiar apps for phone communication, navigation, radio, music streaming etc. are already available mirrored to large screen display within your car.
Having said that maybe it makes sense for new cars to have their own GPS and associated better placed aerial for navigation, so providing redundancy. I was surprised when we first experienced our now ten year old F54 Mini that it not only had its own built in Satnav but that my bluetooth connected phone had any chosen route automatically mirrored to it via Google Maps app.
