Genesis customer service responded to my ticket and we tried some things that worked! At least for 2 phone calls, I don't know if it will hold. For reference, I'm on the latest ios 18.0.1. We:
Inside the car I clicked "Forget" for my car in my phone's bluetooth device list
Disconnected the bluetooth on my phone
Put the car into Accessory Mode
Held down the Map and Setup buttons approx 10 seconds or so, until the car reboots and the Genesis sign comes up on the screen (hard reboot, but shouldn't affect settings
Once rebooted into Accessory Mode, started the car for reals
Turned bluetooth on my phone on
Went into the Setup/Device Connections into the Add Device Screen
My device was already there. I tapped "Add" anyway to put the car in pairing mode so the car showed up on my phone
Paired on my phone
From there, my phone asked if I wanted to use
CarPlay. I said yes, it showed up on the car and I had two 3 minute calls with no issues! FWIW, it looked like after everything reset, once my phone connected to
CarPlay, the wifi was turned off (not by me). It did that both times.
Sadly, I went through these steps on my spouse's phone and
wireless CarPlay won't work on his phone at all. That may be because he did some somersaults to get back to wired, or it could be something else. He's on ios 17, not the latest 17 either
They also suggested getting in touch with Mapsoft, the people responsible for pushing the update. The number is (888) 757-0010, you usually have to press 2 and then...something else, apparently I didn't write it down