Not the parent poster. For maps I use OSM. I have 3 apps installed, Pure Maps, OSMscout and modRana. I don't use navigation, but I understand that with OSM the navigation can be somewhat of a disappointment.

There was a native app for Here Maps, but IIRC it was only licensed and available for the Jolla 1. I don't have it installed on my Sony XA2 and I think it's not available either.

I have HERE Maps on Xperia 10 ii, straight from Jolla Store. Maybe it's because I bought their paid package?