The SnapMount 3 is only a Car Mount and Wireless Car Charger meaning this can't be used as a data transfer for Apple CarPlay.
There is an option for you if you would like to use a SnapMount Wireless Charger in your car, you'd just need to purchase a CarPlay wireless adapter, something like this
The way this would work is you would plug the SnapMount 3 into the 12V cigarette lighter socket and then you would plug the CarPlay wireless adapter into the USB socket, this way you would be able to charge your phone wirelessly and utilise CarPlay.