Well, I'm not entirely sure. It depends on how popular this particular concept is among the fanfiction writers in that fandom. Some might find it an interesting dynamic to explore, so there could be some out there. You should also check out any dedicated Naruto fanfiction forums where people might recommend such stories.
One possible scenario in this fanfiction could be that Sakura realizes her long - hidden feelings for Naruto when she sees Hinata getting closer to him. She might start to act out in small ways, like being a bit more snippy with Hinata during team meetings or training sessions. However, she also has to deal with her own sense of pride and the fact that she once rejected Naruto.
In many Naruto fanfictions, Sakura can often be depicted as getting jealous quite a bit. She has strong feelings for Sasuke, and when she sees other girls getting close to him, it can trigger her jealousy. For example, in some fanfictions where a new girl character is introduced and shows interest in Sasuke, Sakura's jealous side comes out strongly.
Maybe it's because of Naruto. If Hinata has a closer relationship with Naruto than Sakura does in the fanfiction, Sakura could be jealous. After all, Sakura has her own feelings for Naruto.
In such a fanfiction, Hinata might be jealous of Sakura because Sakura could be more popular or confident. Maybe Sakura has skills that Hinata wishes she had, like better combat skills or more outspokenness. Also, if there's a love interest involved, and the guy seems to pay more attention to Sakura, it would make Hinata jealous.
Sakura has always been a confident girl, but when it comes to Hinata, she can't help but feel a tinge of jealousy. Hinata's gentle and shy nature seems to draw people in, especially Naruto. Sakura notices how Naruto's eyes soften when he looks at Hinata. One day, at a village gathering, Sakura sees Hinata and Naruto chatting happily. She feels a pang of envy, but she quickly shakes it off. She realizes that she has her own strengths and that jealousy won't get her anywhere. So, instead of dwelling on it, she decides to focus on her own growth as a ninja.
Sakura's jealousy might manifest through her actions. For example, she could be cold towards Hinata when she sees Naruto and Hinata together. Maybe she makes snide remarks or tries to insert herself between them more often.
The jealousy can create conflict. It might lead Hinata to act out of character, perhaps trying to compete with Sakura in ways she normally wouldn't. This can drive the plot forward as it adds a new dynamic to the relationships between the characters.
Sakura could develop by facing her jealousy head - on. She might start to question her own feelings and motives. This self - examination can lead to her becoming more self - aware and less impulsive in her actions.
In the fanfiction, Sakura could be jealous because she has an ego. She might have thought that Naruto would always be there waiting for her. But when he falls for Hinata, it bruises her ego. Additionally, she may have seen Naruto as her safety net, someone who would always support her no matter what. Losing that special status to Hinata makes her envious and jealous.