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

Obito's Mangekyo Sharingan never lost its light ... have brought Obito back to life through the Rinnegan's Rinne Rebirth ...

Sasuke, for example, awakened his Sharingan after witnessing the death of his clan and Obito got his eyes ... is briefly able ...