Well, not really, no. I mean, if she's making a move, she should obviously make the move, but "to inflict harm, you have to make a move" isn't one of Apocalypse World's rules.
At that moment, you have to judge whether she's making a move. It'd be legit to say, for instance, that she was acting under fire to seize by force, or whatever. But my judgment in that moment was that setting off her pain-wave projector was just, like, a thing she did with her thumb while she was curled there in the rubble of her room, like checking her watch would be.
Setting off a pain-wave projector, in other words, is basically like turning on a bathtub faucet or starting a car. You do it, and it does what it does. Maybe it's part of a move, maybe it isn't, case by case by case.
-Vincent