So you know, servers are not all linked. They're grouped into data centers. The Duty Finder will pull players from any server in your data center, so while you'll see players from multiple servers, you won't see players from every server.

Odin is part of the Chaos data center. Chaos is an EU data center. You might have a bit better luck enabling German and French (and heck, while you're at it, Japanese) in the Duty Finder's language list, so you're not missing out on large chunks of your data center's player base. Just be prepared to auto-translate if need be.