A good neglected fanfiction might involve Naruto being influenced by the council to keep his distance from fem Sasuke for political reasons. She, in turn, could start to doubt their relationship. The story could then show how Naruto realizes his mistake and fights against the council's wishes to be with her again.
One example could be a story where Naruto is so focused on becoming Hokage that he unintentionally neglects fem Sasuke. She might start to feel left out and lonely. In such a fanfiction, the author could explore her feelings of abandonment and how she tries to get Naruto's attention back.
There's a fanfiction called 'Silent Longing'. In this story, Fem Sasuke has feelings for Naruto but he is too busy chasing after power and recognition in the ninja world to pay attention to her. It shows how she copes with this neglect and her own growth in the process. Another one could be 'Abandoned Promises' which delves into how Fem Sasuke's expectations from Naruto are not met as he neglects her in their relationship.
It could be because fans like to explore different relationship dynamics. The idea of Naruto, who is usually seen as a hero, having this flaw of neglecting someone like Fem Sasuke adds an interesting layer to their relationship.
Well, it could involve Naruto being overlooked or ignored by the village in this fanfic. And his relationship with Fem Sasuke could start as a form of mutual understanding. Maybe they find solace in each other because of their own issues. For example, Naruto's loneliness due to being neglected and Fem Sasuke's own complex past.
In some fanfictions, Sasuke's possessiveness of Fem Naruto might be shown in a more romantic context. For instance, he gets jealous when other guys show interest in her. He might then mark his territory in a sense, like by putting his arm around her or giving cold stares to the other guys. He would also be very clingy, always wanting to be with her and not wanting her out of his sight for long.
There's also 'Love in the Hidden Leaf'. Here, Fem Sasuke starts to notice Naruto in a new light when he saves her from a dangerous situation. His selfless act makes her see his true nature and she begins to fall for him. It has a really interesting plot that shows how their relationship evolves over time.
One good example could be a story where Naruto, with his unique abilities, teams up with Fem Sasuke who has a different take on the Sharingan's powers. They might go on a mission to save the village from a new, powerful enemy. In this fanfiction, the author could explore how Fem Sasuke's more feminine qualities interact with Naruto's boisterous nature while still maintaining their strong ninja skills.
One popular example could be 'The Exiled Uchiha' where Fem Sasuke is banished and has to find her own path outside of the village. It explores her character development as she faces new challenges.
A really interesting one is 'Fem Sasuke's Heart'. Here, the story starts with fem Sasuke being confused by her feelings for Naruto. As the plot progresses, she starts to understand that her love for him is deeper than friendship. There are also some beautifully written scenes of her longing for Naruto when he's away on missions, which really showcases her love in a very touching way.
One could be 'A New Bond'. In this story, Naruto, who has been neglected by the village, forms an unexpected connection with a female Itachi. They start to understand each other's pain and slowly develop a deep bond that helps Naruto regain his confidence and also changes Itachi's view of the world.
The neglect can create a lot of distance. For example, fem Sasuke might start to close herself off emotionally. She may feel that Naruto doesn't value her as much as she thought. This could lead to her being more cold and distant towards him.