Sakura could also develop her chakra by exploring her family heritage in fanfiction. Maybe there are hidden techniques or ways of chakra manipulation that her ancestors knew. By delving into her family's past, she discovers a special type of chakra meditation that helps her unlock more of her potential. This could involve visualizing her chakra as a sakura tree, with each branch representing a different aspect of her power, and as she focuses, the tree grows stronger and so does her chakra.
Maybe he starts by observing Sakura's current chakra control. He might notice her flaws and then begin with basic chakra exercises to improve her stability.
There might be a sakura chakra fanfiction where Sakura's chakra is somehow mixed with a foreign energy source. This causes her chakra to mutate and gain new properties. She may find that she can now use her chakra to create force fields that not only protect her but also those around her. This new form of chakra also makes her a target for various groups who either want to study it or use it for their own malicious purposes.
One possible reason could be a disruption in her chakra control. If she has some internal blockage or instability in her chakra system, it might prevent her from using it for healing. For example, she could have been affected by a curse or some sort of dark chakra influence that throws off her normal chakra functions.
It might create more conflict. Since she can't heal, the group she is in will face more challenges when they get injured. This can lead to difficult decisions about whether to continue their mission or retreat, adding more tension to the story.
One possible plot twist could be that Sakura discovers a hidden power within herself that is even more powerful than her healing chakra. Maybe it's a dormant bloodline limit that gets activated due to the loss of her healing ability.
One interesting fanfiction could be where Sakura's ability to see chakra leads her to discover hidden powers within herself. She might start seeing chakra in a completely new way that no one else in the Naruto universe has ever seen, and this could lead to her developing unique jutsu.
A plot could revolve around Sakura's chakra being affected by some external force. Maybe she comes into contact with a strange chakra - based artifact that either enhances or disrupts her own chakra. As a result, she has to figure out how to deal with this new situation. She could go on a journey to find a way to restore her chakra to its normal state or learn to control the new power it has given her. This would involve a lot of self - discovery and growth in terms of her chakra understanding.
Character development is a key element. The Sakura OC should grow and change as she discovers and learns to control her chakra sensitivity. Another element is the world - building. It should explain how chakra sensitivity fits into the Naruto universe.