Might already know this, but your phone's hotspot should pass through the location data. We used my laptop on a couple of roadtrips where we wanted to pull the map up larger.
Good to know - there is actually a feature to connect your Android phone to your Chromebook to share the internet connection, and I tried that a few months ago, but the location data wasn't shared. After that I realized while on vacation that using OsmAnd on the phone was enough for all practical purposes, so I forgot about this issue. But maybe in the meantime Google published an update which also shares the phone's location data? Would definitely make sense to have something like that...
What is the protocol for that ?