Well done Splitter! A nice early mated queen there. I really like seeing what they do with pollen when there is a queen cell in a colony but no queen and then later, when there is little if any open brood, and then what they get up to after (or even immediately before) the queen emerges and later starts laying. You've already been doing some of that observing which is fantastic. Great work.
What you might find is that the queen that you say is not mated may in fact be mated but not laying. What I find is that they can mate, still look unmated but then will start laying, sometimes an interminably long time after I think they should (and so much longer after an adjacent queen has), and upon oviposition they will fatten up and slow down. Anyhow, give her a good time to start, if it were me, I'd give her two more weeks at least, not one. Please report back!