She shiwed ACoC, so ill give her that much, but it was just stalling. She showed great toughness, Durability, Haki, and physical strength.
I've said plenty of times in the past, even basic CoA users can use CoC behind their attacks. It's not really "advanced".
Oda is just demarking CoC NOW with the trailing thing, but like I said nothing "advanced" about it. It didn't clash without touch with Kaido.
It makes no sense for Yamato to unlock the greatest weapon of a One Piece fighter, and do 0 damage to Kaido.