Did he get knocked out? He doesn’t have to be knocked out for the rest of the war, he could just be knocked out for like a few minutes, similar to Opera was momentarily knocked out by Jinbe. In my opinion, yes he was because it would make no sense for P1 to vanish for the rest of the chapter. Why not give us at least one panel of P1 saying something like “Big sis!!!” or “Yamato?! Why did you hit Ulti?!”