by the way, i was wondering why people think that yamato has advanced conquerors if she couldn’t even break her chains but had to wait luffy
You don't need Adv CoC to destroy objects like that, you need CoA from Ryou.
CoC works on living beings, it doesn't like, make swords less sharp or some shit. If you want to break those handcuffs, you need Ryou.
This is why Yamato is a very interesting character. She clearly has Adv CoC from her clashes with Kaido, but, she lacks Ryou, which allows you to flow your Haki into your enemy, and attack them from the inside. In order to destroy the handcuffs, you needed to push your Haki into them, crush them from the inside while ripping them apart, then throw them off.
In order for Luffy to harm Kaido, he needed two things:
Ryou, the ability to flow Haki into other beings; and Adv CoC, which dominates the will of other living beings.
Yamato learned Adv CoC from her hardship fighting her father while growing up and from mimicking his combat style to some extent, but was never taught Ryou, so she couldn't harm Kaido very much, even though she had Adv CoC: she couldn't damage Kaido internally with her Haki.
At the start of Roof Piece, Luffy hit Kaido, and could make him bleed with Ryou with his Adv CoC, but didn't have the Adv CoC to do lasting damage; Kaido's Mythical Zoan and natural strength as an Oni allowed him to regenerate easily from damage.
It was only when Luffy combined Adv CoC with Ryou, and flowed his Adv CoC into Kaido, that he was able to surpass everyone else not named Kaido and Big Mom in total power, and start beating the shit out of Kaido.