There is the app osm2gmaps. I haven't used it yet, but according to their description the app is able to "Convert your OpenStreetMap-based application links into Google Maps, Apple Maps or other links (and vice versa) without having to use proprietary software!".
Another way to share a location would be geo coordinates. Google Maps and Apple Maps are able to find them, once they are in the correct format. The preferred format for Google Maps should also work for Apple Maps.