To request new locations in Wildbook, make a new post on the forum under the Feature Request category.
Keep in mind that for matching, Wildbook searches for candidates that match the species and the exact location. From our Bulk Import Cheat Sheet:
Check that the Location ID format is an exact match with what’s in Wildbook or Codex
So if you’re running matches against the new location, it’s only going to show you match candidates that match the exact location ID entered under the Encounter.locationID field of your spreadsheet and for now, that will likely only include the salamanders you’ve uploaded.
If you’ve only entered coordinates and not a location ID, it will only show you match candidates that match those coordinates.