Naruto could have an arc of self - discovery. He'd have to find out who he is without his voice and sight. Another character arc could be his friends' journey in understanding and helping him. For instance, Kakashi might train Naruto in new ways to fight. And Naruto might also have an arc of acceptance, coming to terms with his disabilities.
One possible character arc for Naruto is that of adaptation. He starts off struggling with his new conditions but gradually learns to function. His friends also have arcs. Sakura could have an arc of frustration as she tries to find a medical solution but fails at first. Then she could have an arc of perseverance. Sasuke might have an arc of re - evaluating his relationship with Naruto. He realizes that Naruto's situation makes him more complex and worthy of respect.
In this fanfiction, Naruto's character arc could be centered around his transformation. At first, he might be in a state of despair, but then he begins to fight back. He discovers new abilities and strengths. His friends' character arcs would be intertwined. They would have to learn to be more empathetic and creative in their interactions with Naruto. For example, Shikamaru might use his intelligence to come up with new strategies for Naruto to use in battle, which would also be part of his own character growth.