Sarada needs the Rinnegan if she wants to scale up to the stronger enemies in Boruto. She could obtain this power.

Rinnegan-wielder and resident badass Sasuke Uchiha uses this jutsu masterfully ... within the Uchiha clan who have awakened the Mangekyo Sharingan, has often been heralded as the ultimate defense ...

Sarada Uchiha gains significant power ... Speculation suggests Sarada may surpass Sasuke through a powerful Mangekyou Sharingan or even Rinnegan. After the conclusion of the Naruto series, Naruto ...