Sygic Truck (also aimed at motorhomes) is a phone app that allows you to put in vehicle dimensions to be considered in the routing. But so far it's been confined to the phone screen. Apparently they are adding the Android Auto functionality from the car version of the app, so you can use it on a suitable Android Auto compatible in-dash radio.
The First Truck Navigation App for Android Automotive Is Now Official
Sygic has announced that its truck navigation software now comes with support for Android Automotive, Google’s fully-featured vehicle OS
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