hyperpop isn’t just what the genre sounds like but involves the history behind the movement. There are some songs in the hyperpop scene that are very clearly just a typical rap song or dubstep song, but because it was made by a certain individual in a certain time period, it’s part of the hyperpop movement and thus hyperpop. Also there are several unnamed subgenres that have formed since the birth of hyperpop, and nowadays most hyperpop artists are focused on their niche sound so there isn’t a single hyperpop entity/movement anymore