Hinata was able to see through Naruto's reality because Naruto had a misunderstanding about the Byakugan.
It is undisputed that the Byakugan can see through chakra, but it can also see the flow of chakra within the body.
The Shadow Clone Skill, though creating tangible clones, essentially forms them entirely from clusters of chakra, without any muscles, bones, or meridians.
This meant that in Hinata's eyes, what she saw were humanoid clusters of chakra, but looking at Naruto, she could see the pathways of chakra flow inside his body, even the transparent outlines of his bones and muscles.
At that moment, facing Hinata's punch, Naruto had no time to dodge; he could only immediately gather a Rasengan to collide with it.
The blue spinning energy collided with a blue lion, which opened its huge mouth to bite the Rasengan, continuously pushing Naruto toward the edge of the arena.
Zzzap!
