In reply to arose:
If I'm understanding correctly, I think there's some confusion being caused by the fact that the data in the app and ukc are organised differently, with some extra confusion added by some unclear ui in the app.
In this case the name of the cliff you're looking for appears in the crag name on ukc, but is a buttress in the SMC data in the app. Etive mor is returned from the search in my screenshot because it has a buttress matching the search term. It's not terribly obvious that only when you install that package you will find topos relating to the buttress "Stob Coire Altruim" (see new screenshot).
With that package installed, you should be able to search for any routes that exist there in the routes tab (but this is currently only possible for installed crags/routes which is maybe why your route search failed(?)).
Hopefully that answers your question, but if we're talking at cross purposes, please let me know.