I marked your lot as parking. (You had tagged it as a park, like as in a public area with trees and grass.)

One thing to consider is that updates may take a while to trickle down to the end consumer, in this case your truck's display. This can take quite some time (or almost none at all) depending on the infrastructure in between. Since the data has to get through Mapbox's system, then Rivian's servers, then a map update to your truck itself, it might be a while. 

Anyway, regarding the core issue, perhaps the spot you park is just ever so slightly closer to your neighbor's house than your own. How about this: We add your address to the parking area. Then the closest feature to your parking spot would have the right address. That depends on how Rivian interprets OSM's data, but it's worth a shot I think. 