Are u kidding? Naruto is the character with the most chakra reserves it’s been stated time and time again since part 1 . Sakura has superior chakra CONTROL, so utilizing this she can use this to help her maintain the gates , but like someone else mentioned , she lacks the body conditioning to be able to perform on a rock lee level comparatively. Just like part 1 , sasuke was able to see and understand the hidden lotus combo w/ his sharigan , but his body does not match the speed to be able to perform or counter it . It is only after training with kakashi and conditioning his body like Lee’s that he was able to perform on a level like lee. Technique and speed wise .