She need to have large chakra pool to mastered sage mode. It would be cool, if she good trained by Naruto and Sakura, because Sarada needs to get the same strength as EMS Sasuke. Unfortunately she cannot gain EMS.Why wouldn't she want to be trained by a byakugou user, who can teach her to control that chakra without wasting any. which is how she saved naruto's life.
If Sakura and Sasuke didn't get Sage Mode Sarada isn't either, she is the eyes. The closest thing to sage mode she would probably get is byakugou seal.
And if she does learn it, having Sakura's chakra control would be vital to harnessing the energy. Naruto have a strong body make for hold strong chakra, it is no doubting that his heritage help him out with sage mode.