I have a Nissan Rogue 2021 and iPhone 14 Pro Max. Carplay was working fine until I decided to update to the new beta program and now my carplay does not seem to want to operate at all. I do the fixes online suggest in rebooting both systems, forgetting entirely and reconnecting. In the process of doing so, I can get the prompts to start with "Allow while unlocked?" But once selecting that I am unable to actually use the Carplay from the phone. It doesn't even give option to switch to it when I attempt to change audio output. Since June. Starting another post in hopes something can be done.
CarPlay Still not Functioning
You might be running into a beta software bug. CarPlay often has issues on beta iOS versions. Try reverting to the latest stable iOS release and reconnecting your Rogue—this usually fixes the problem. If you want to stay on the beta, reporting the issue via Feedback Assistant is the best way to get Apple’s attention.