She basically never attacked them on panel for real.
She defeated them off panel.
Then she lowered her guard. They got up and attacked her, and she basically only tanked their attack, trying some counterattacks, but that's it.
Advanced Conqueror? She forgot she has. Even when she was punching Law, she "conveniently" forgot about that. Weird...
Well, congratulations for Kidd and Law in giving their 110% in 2 vs 1 to have their attacks tanked and laughed by Big Mom.
Especially Kidd's.
At least with all the possible PIS, and "help" from Kanzenbo and the bombs, they managed to BFR her.
She was not KOed. She even smiled at Kidd's attacks and that was after receving Law's one before.
In 1 vs 1 they are nothing to her. They just BFRd her like in chapter 1009, just with greater coreography. They coudn't defeat her even with all the advantages, and that's now clear.
Well, King already did that at the beginning of the arc, in 1 vs 1 and without all that fuss.
Law is pretty impressive, though. No doubt.
Zoro > Law >= Kidd