carplay has nothing to do with Google Maps.
Personally, I don't mind the built in nav. I think it works fine, my only request is to allow better zooming on the pilot screen, and add in sattelite view.
Also, for the comments above, looks like I stand corrected and both Android Auto and Carplay now allow multiple data output streams so in-car nav can be augmented.
(Also, as an aside: Android Auto and Android Automotive are
different, Google was always the best at names
https://www.autoevolution.com/news/...otive-everything-you-need-to-know-169136.html )