Hi!
How can I help push this along ? https://phabricator.wikimedia.org/T141813
We're working on it. The prerequisite for this is to make search work well in Wikidata itself (now rather far from ideal), and then we can interface it from WDQS. That means WDQS part will take a bit longer, since we are starting with Wikidata part, but it avoids duplicating work and at the end we'd get good search in both places.