Ysah he overpowered Crocodile's attack too, a cutting attack no way he can do that without haki.
No way he did all this simply by brute force.
And Luffy's second jet gatling overpowered Lucci's tekkai, I am guessing he used again unconsciously CoA there with his Jet Gatling to overpower his tekkai and beat him.
But as I said, there's no evidence, therefore it remains my headcanon, but still Blackbeard noted his haki since back then in Jaya, some questionable things.