I always play spiritual energies being a kind of "I can recognize this, but not quite" where Urahara's sensing is concerned. More like a scent on the air than an actual full-blown feeling, so he couldn't, say pick it out of a crowd like he could a shinigami reiatsu but he would know she gives off the same sort of sense that a highly spiritually sensitive human would. Possibly moreso since... Raava.

But with some CR building and your permission, he could probably get to a point where he notices more things about it. That's how Tifa and I have done his stuff with Rey thus far.