Halacha’s attitude towards pedophilia

Hello Rabbi, I wanted to ask what the attitude towards pedophilia is in Halacha? It is known that the Maimonides writes that a male having sex with an adult is more serious than having sex with a child. I assume this is because a child is not mature enough for his sex to be considered sex and therefore cannot be held liable, but from what perspective can he be punished? Is this in the Torah? Is there any attitude at all? I ask this from the premise that pedophilia is more serious than having sex with a male. If this assumption is wrong, I would be happy if you could correct me and explain to me why it is wrong. Thank you in advance.