They both dropped the ball big time. de Blasio went to the gym on literally the last day before those kinds of businesses were shuttered. He kept waffling on shuttering the schools and waited way too late. He only started taking things seriously when the heads of his department of health threatened to resign if he didn't take more action. See e.g.: https://www.cityandstateny.com/articles/politics/new-york-ci...

They both started off as a complete joke on this. Cuomo has at least since been improving, but de Blasio remains a complete joke. He's incapable of so much as even closing some empty streets (or some lanes on streets) to give pedestrians more space to spread out. Other cities have been doing this to great success, but de Blasio has only ever understood things from the perspective of being behind a windshield.