This is the platform Maps.me is based on, correct? I ask because I downloaded Maps.me the other day, after reading HN, and have found it to be missing most businesses that I've attempted to search for. In addition, there seems to be no obvious way to suggest missing destinations.

I too want Google/Apple maps alternatives to succeed, but my limited trial so far has not been promising.

You might try looking at OsmAnd. It too uses OpenStreetMap data, but it does allow you to add some amount of missing data as well (see https://osmand.net/features?id=osm-editing-plugin).

This, of course, is part of the advantage of OpenStreetMap, you notice something missing, you add it, and now it is no longer missing.

That's strange. I just checked Maps.me on Android, and if you open the hamburger menu there's an "add a place to the map" option.

Maps is based on Maps.me.