Here is a map to see where people affiliated with apple are contributing to openstreetmap: https://piebro.github.io/openstreetmap-statistics/#e19b
it seems they use OSM data everywhere but in North America and most of Europe.
> The main provider of map data is TomTom, but data is also supplied by Automotive Navigation Data, Getchee, Hexagon AB, IGN, Increment P, Intermap Technologies, LeadDog, MDA Information Systems, OpenStreetMap, and Waze.
