You're using Google Maps that was built for iOS 17 on a beta of iOS 18. Google hasn't updated that app for iOS 18 yet, and even if they're actively working on it (which they likely are), they cannot release it yet because iOS 18 isn't out yet. You're just going to have to wait.
If you've found bugs with Apple's CarPlay - specifically CarPlay - then I recommend you raise a Feedback Report here: https://www.apple.com/feedback/
If you've found bugs in Google Maps, then you should report those to Google.
Topic:
Community
SubTopic:
Apple Developers
Tags: