To promote positive 'owl house' fanfiction, we could create platforms or groups dedicated to it. These spaces can have rules against sexual content and instead encourage creativity based on the show's unique world - building, like the magic system, the diverse characters, and their adventures. Additionally, the official 'The Owl House' channels or websites could feature and recommend positive fanfictions, which would inspire fans to create more of the same kind.
One way is to start fanfiction contests that have specific themes related to the positive aspects of 'The Owl House', such as the exploration of the different magical realms or the development of the characters' personalities. By highlighting these areas, fans are more likely to create positive fanfiction rather than sexual ones. Also, fan communities can promote and share only the positive fanfictions they find, creating a positive cycle.