I believe she does, she just doesn't need to use them. In all honesty Sakura is the superior ninja of team 7 because she has chakra, chakra control and intellect,
Sure Naruto has extreme chakra and he can learn things fast because of that,
And Sasuke can copy things,
But Sakura can instantly preform jutsu with knowledge of what she wishes to do,
Everything Naruto and Sasuke even kakshi does is handed to them.
Sakura should know a lot,
There is no reason why her genjutsu wasn't shown,unless she's been perfecting her chakra control all of this time so the that could be unbreakable ,
If you think about it her learning medical ninjutsu first makes her even deadlier at genjutsu, becaus of her knowledge of the body, and because of her perfected chakra control. And medical ninjutsu and genjutsu are both used around the yin element.
Sakura is the type of character where ass pulls are impossible to make, because in all honestly she was too perfect from the begining, her only problem was her stamina, so the real reason why she is underdeveloped is because she would outshine the boys too much.