Immich is exactly what you're looking for. Debugging the installation problem will be a lot less work with a way better result than trying to get Nextcloud to do what you want.

Memories has come a long way.

I don’t think it has the specific features you requested, sorry. But I like it as something that’s baked into my Nextcloud container (esp. as I haven’t had the time to set up Immich yet).

I'd debug immich. A good Photo pins on a map can be done with reitti but I think that connects to immich as a backend.

Sometimes the tool you want to use just isn't right and you have to make it yourself. (I speak from Experience)

Like others have said, Immich is great for this. It's damn near a copy of Google Photos without all the Google which is very nice. Fair warning however, I'm about to enter week two of backing up. I've got 14000+ assets to upload, and from what I've seen the first upload is the most brutal. Good luck, traveler!

Having a world map that has pins on it based on location EXIF data in photos

Don’t you get that in NC already, if you go to Maps > My Photos ?

https://www.photoprism.app/ might be worth a look, the map feature is included and I found the auto classification not too bad (already a while ago).