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

Sarada Gained The Eternal Mangekyo Sharingan Before The Timeskip Sarada Is Yet To Utilize Her Powers Sarada Uchiha gained the power of the Mangekyo Sharingan in the first part of the Boruto series.

Boruto: Two Blue Vortex is gearing up to see the debut of Sarada Uchiha's Mangekyo Sharingan soon, finally building up the future Hokage to realize her potential and become everything she was ...

The best example of this being the fateful final encounter between the Uchiha brothers Itachi ... dimension connected to both of their Mangekyo Sharingan Eyes. The fight choreography is ...