Yes, there are likely many fanfics out there with the concept of Naruto being at Jonin level. You can check fanfic platforms like Fanfiction.net or Archive of Our Own.
One great young Jonin Naruto fanfic is 'The Ascent of a Young Jonin'. It focuses on Naruto's journey as he transitions into a Jonin, facing new challenges and forming deeper relationships with his friends. The story has some really exciting battle scenes and character development.
New storylines. Fanfics can create unique scenarios. Maybe Naruto has to team up with unlikely allies as a young Jonin to face a powerful enemy that the village has never seen before. It adds an element of excitement and unpredictability.
One possible plot could be Naruto facing new and tougher challenges as a young Jonin. He might be assigned to lead a special mission that requires him to use his unique skills and leadership abilities. For example, he could be sent to a border area where there are constant skirmishes with enemy ninja. Naruto would have to strategize and protect his team members, all while dealing with the expectations that come with being a Jonin.
There could be a character who has a disability in the ninja world, like being partially blind but having an amazing sense of hearing or smell. Naruto would see their potential and include them in the team. Another member could be a former criminal's child who is trying to make a name for themselves in a positive way. And there could be a super - intelligent ninja who is great at strategy but lacks in practical combat experience, and Naruto would help them gain that experience.
Another jutsu they might learn is the Summoning Jutsu. Naruto has a strong connection with the toads. He could teach the genin how to form the necessary hand seals and make a contract with a suitable summon. This would give the genin an extra edge in battles, being able to call upon a powerful ally.
The appeal lies in the characters. Naruto is a well - loved character with his boisterous and determined personality. Hinata is shy yet strong in her own way. Their dynamic at the Genin stage can be very captivating. Fans might enjoy seeing how Naruto's energy affects Hinata and how she slowly comes out of her shell around him.
There's also 'Naruhina's Genin Adventures'. This fanfic is filled with exciting action sequences. It showcases how Naruto and Hinata work together as genin, facing challenges and enemies. Their unique skills and personalities complement each other, making it an engaging read.
Sasuke could also be a main character in the 'naruto jonin exams fanfic'. His skills and his rivalry with Naruto would make for an interesting plotline during the exams. Also, Sakura might be a main character as well. She has grown as a ninja and could show off her new abilities during the jonin exams.