I think such a fanfiction would likely be quite inappropriate and might violate the themes and values of the Potter world. It's not something that's usually considered within the normal range of fanfiction.
I'm not really familiar with such a specific and potentially inappropriate type of fanfiction. It doesn't seem to be a common or mainstream theme.
There are all sorts of fanfictions. Some might focus on alternate storylines where she has different adventures or relationships. Others could explore her backstory in more depth.
It could be a story where the female Harry Potter faces unique challenges and adventures in the magical world, with a focus on her perspective and experiences.
It usually involves a twist where a female character takes on the role of the chosen one instead of the traditional storyline. The story might explore different power dynamics and character developments.
The fanfictions usually explore various possibilities like her facing new magical challenges, developing deeper relationships with other characters, or uncovering hidden secrets of the wizarding world.
It could be a story exploring their sibling relationship and adventures in the magical world. Maybe it focuses on Harry protecting and guiding his sister through various challenges.
Typically, such fanfiction plays with gender roles and expectations. It could involve new magical abilities or plot twists specific to the fem version of Harry. The world-building might also be expanded or altered to accommodate this change.
One possibility is a fanfiction where the god is a guiding force for Harry and his sister, offering them wisdom and magical abilities. Or, it could be a tale of them uncovering a secret prophecy involving the god and their destinies.
It could be a magical adventure where Luna overcomes various challenges and discovers her true powers.
You can find various types of fanfiction on DeviantArt related to 'the girl who lived'. Some might focus on her adventures, while others might explore her relationships or alternate storylines.