Yeah, it's labeled a knuckleball. I understand that he doesn't actually throw a knuckleball, because he doesn't actually throw a real pitch, because it's not real. I understand that the label is irrelevant.
But the pitch is labeled as a knuckleball, even if it isn't worth anything. You can keep saying it's not a knuckleball, but the pitch is labeled a knuckleball. I don't know what more to tell you about that.
Yeah, we all get that it's just a pitch, but the "pitch" is labeled as a knuckleball, and for the fun of the game, I call it a knuckleball.