Before the battle start the Scabbards couldn't hurt Kaido. They obtained that power during battle. That means they can now use that power at will.
Yamato obtained ACoC and she can use it at will.
Momo being an adult means he has adult strength. Add his dragon DF powers like creating clouds to fly and carry an island. It was mentioned Momo is much tougher now and Luffy and Zoro tested him. All that implies Momo has a durable body like Kaido now since he has a similar DF.
Scabbard hurt and pierced Kaido the moment they first engage into fighting with him at start of raid
They were at peak when fighting Kaido, they tried their best but failed to beat him, it's the SN time to take over
After they went to downstairs, they aren't doing anything significant, except the Duke duo who take on Jack and Pero
When did Yamato obtained adCoC lol
She already have it.
Momo already was adult in the raid
This end of raid momo and current momo what's the difference??
1 week of resting doesn't make any difference.