You didn't look very hard. Google came up with this as the first entry:
https://9to5mac.com/2018/06/04/apple-wwdc-app-updates/
Carplay runs on your phone, so I don't see what would have to be updated on the car side.
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Do you have it installed on your IOS device? If so, most likely the apps need updating or it hasn't been activated yet.
Yeah, Waze will have to update the App, I hope they beta test their new app, so we don't have to wait until fall.