I think it’s just routers, ISPs and open internet standards (http, etc) that keep that wall up. 🥲

If you have all of the photos, then you could use a tool like Immich Go, which would automate much of the tagging and album creation. I don’t know if Immich Go accounts for metadata from Synology. However, Synology might be able to export everything.

I would also recommend putting Immich remote access behind Tailscale (I.e., pointing the remove access server to your tailnet and using that domain name and the Immich port to login).

All 2+ of them?

The DLC is also great. A puzzle to even start it! Also don’t look up anything. It’s best going in blind outside of the fact that it’s an excellent game.