In reply to AlexxelA:
It looks like it has a different name in rockfaxland: "Pike o' Blisco", with "Black Crag" being a buttress name there. Searching for "black crag" will show pike o blisco as a result, but it's not clear why unfortunately, see first screenshot. These name mismatches are a continuing source of friction, and we can probably improve on the system a bit.
One feature we'll be adding in the future is to make the route search (under the "routes" tab) work in the same way as the crag search under the "crags" tab - so routes that exist but are not installed yet will appear in a grey section at the end with an option to install them, see second screenshot. This wouldn't be a perfect solution but it would help a bit.