The convenience here for you is CarPlay though. You could instead use a different more accurate gps device you plugin that doesnt have the data leak issues concerned in articles like this one. Then if you really needed you could pull out a sort of external monitor stick it over the other display when carplaying and when needing car-vital features you need the car display for, pull over and temporarily do that thing then pull your extra monitor out again and keep going.

I think maybe being grounded has changed - I would be comfortable doing what I described but I imagine your comfort with your preexisting solution means your ground has shifted and a reality check means you woudl rather give away your data than take the higher friction option?