Naruto might show his prodigious abilities in combat. He could quickly learn new jutsus and use them effectively in battles, just like Kakashi did at a young age. For example, he may master complex ninjutsu in a short time and adapt them to different combat situations.
Another way Naruto could show his prodigious abilities is through his leadership skills. Just as Kakashi was respected by his peers and could lead teams effectively, Naruto might inspire those around him. He could motivate other characters to achieve greater things, and his charisma could attract powerful allies, which is a sign of a true prodigy in the Naruto universe.