Well, one way this could work in a fanfiction is that Naruto could use Yuta's powers to enhance his combat abilities. Yuta has some really unique and powerful cursed energy techniques. Naruto might be able to combine his chakra with Yuta's powers, like using the Rasengan with Yuta's cursed energy for a super - powered attack. It could make for some really interesting battles against tough opponents like Madara or Kaguya.
It's hard to give an exact time as it depends on the manga's plot development. But typically, Yuta Okkotsu shows up when certain events and character arcs lead to his introduction.
If Naruto had Yuta's powers, his fighting style would be drastically different. He'd no longer rely solely on ninjutsu and taijutsu. He could use Yuta's cursed energy to create new types of attacks. For example, he might be able to send out waves of cursed energy like Yuta does, which could catch enemies off guard. This would make him a more versatile fighter and a greater threat to his enemies.
The main characters of Hua Queque's novel,"The Eldest Princess 'Little Lover (1v1)" were Xuan Hua and Lu Heng. This novel was a high-level novel with excellent writing. It told a beautiful and pure love story. The latest chapter of the novel was verse 38, which described Eldest Princess Xuanhua's anger and dissatisfaction at Lu Heng's victory. Xuan Hua had raised a male pet in the backyard for three years, but Lu Heng had won the top scorer in one fell swoop. Xuan Hua had decided to chase him out of the residence. Lu Heng returned to Luoyang after three years as an official. At the palace banquet, Xuan Hua looked at Lu Heng's face and recalled the scene of him being tied to the bed. Hua Queque's novel was loved and recommended by the readers.
Maki in fanfiction usually has a fierce loyalty to her friends, especially Yuta. She is the type to fight for what she believes in. Yuta is sometimes portrayed as being a bit naive in the ways of the world outside his own small circle, but his pure heart makes him endearing. In many stories, their different personalities create an interesting dynamic, like in a story where Maki's boldness gets them into a risky situation and Yuta's calm thinking gets them out.