Sakura is now strongest in the world

[Naruto D Luffy]

hell no, u mean naruto uzumaki

 

[akabara the vampire king]

She has no chakra for mystical Palm . She has plenty of chakra left.
To heal sasuke and naruto she will extend her yinseal makings to the respected arms and cause them to regenerate,

They don't need her both of them can regrow their arms by combining their powers and using COAT GG

 

[Uzumaki Macho]

What about solo rock?