I did just see that there is an iphone update as of today. "This update provides important bug fixes, security updates, and addresses a rare issue that prevents wireless CarPlay connection in certain vehicles."I've tried both with no luck so far. I did just read some people saying resetting the Network settings on Iphone IOS18 fixed it. So I just did that, I'll see if it works for me when I head out for lunch.
Edit: No luck with the Network setting reset.