If you go by medical definition, that would be hebephilia. Pedophilia is only used with children younger than 11.
The reason in this case could also have been because she was an easy target, the age must not necessarily be the reason.
Repeatedly telling people he’s not technically a pedophile is really not in any way helpful. He raped a 12-year-old multiple times. Who is it hurting to call him a pedophile?
Why do you need to call him something if it’s inaccurate? Just call him a child rapist and be done with it. Words have meanings and there is no reason to use them incorrectly.
As for who it’s hurting: everyone. Pedophila literally has nothing to do with rape. It is a disorder. It’s estimated it effects as much as 3% of the population. The vast majority of those people have never done anything wrong. They were simply born that way. The more people conflate the medical term with crimes the less likely pedophiles are going to seek help or treatment. Nobody wants to risk being outed as part of the most hated group of people on the planet.
If you want to actually help children instead of being angry the best course of action is to destigmatize the disorder so people can get counseling without fear of ruining their lives. Forcing people to bottle up their feelings/urges/etc. does not lead to good outcomes.
Real talk: constantly conflating child rapists with pedophiles is actually a problem. Pedophiles didn’t choose their sexuality, however coming out would destroy their lifes because of how society sees them, so they don’t. Which means they don’t seek help which increases the risk of them acting on it at some point in their life. Even if you feel no sympathy towards them, which I get, them getting treatment is important to reduce cases of child abuse.