It could mean that she has read or been exposed to a sufficient amount of 'Encanto' fanfiction and doesn't want any more. Maybe she's found that a lot of it is repetitive or just not to her taste anymore.
She might have found that the quality of the 'Encanto' fanfiction she's been reading has declined. There could be a lot of poorly written or unoriginal stories out there, which made her decide she'd had enough.
You could try reading fanfiction from other Disney movies like 'Moana' or 'Frozen'. They also have rich worlds and interesting characters that can provide a great reading experience.
Take up a new hobby. It could be something like painting, where you can express your creativity in a different way. Or you could try gardening and get in touch with nature. These new activities will keep you occupied and help you move on from 'Encanto' fanfiction.
They might be really surprised. Some characters could be flattered by the positive portrayals in the fanfiction. For example, Mirabel might be happy to see different interpretations of her story and how she's seen as a hero in some fics.
It could be Harry Potter. Since the Harry Potter series is extremely popular, there is a vast amount of fanfiction written about the character Harry Potter. So it's very likely that this 'Harry' refers to him.
Well, it's a bit of a subjective matter. While there are a huge number of fanfictions already, new fans are always emerging and they might want to contribute their own stories. However, from a certain perspective, with so many existing ones, it could be argued that there's enough. There are so many different takes on the characters, relationships, and the magical world that it might be saturating the market so to speak.
It could mean that Harry, perhaps a character named Harry, has reached a point where he has had an excessive amount of fan - created fictional works about him. Maybe he's tired of the various interpretations, plotlines, or simply the overabundance of fanfiction that exists regarding him.