This query started because I was looking for a restaurant menu and the Apple map popped up. A lot better looking than Google or Mapquest. I didn't know how it happened so i asked.
Bright idea, I searched duckduckgo and Apple Maps together and got a surprise. It for turns out that the people that use duckduckgo (DDG) as their search engine will get apple maps as DDG licensed Apple MapKit Js from Apple in January. https://www.thurrott.com/cloud/197786/duckduckgo-integrates-apple-maps-into-search-results
I didn't really notice as I don't use location searches too often. In the past I have opened Google maps or Mapquest to search for locations. Now I can search for locations in DDG same as on my iPhone or my wife's iPad as well as my car navigation.
I haven't checked out any other Windows 10 browsers but I suspect that if they use DDG, they should get Apple Maps.
In any case, your statement is true. Apple Maps does not run on Windows itself.