Since you didn’t, and school isn’t allowed to, teach them someone else will. It might be online or in person, but there is nothing more attractive to real pedophiles than kids who lack the basic skills and open communication with adults to tell on them.
Kids who are aware of their bodies and their place in the world can openly talk about sex with trusted and safe adults, understand what it means to be LGBTQ in some basic fashion and what to do when someone makes them feel threatened, making for poor targets. That’s not grooming; that’s teaching them basic self-defense. That’s teaching them the truth and the basics of reality.
I know a lot of supporters and people in the child abuse community don’t want to hear this, but I will not stand by while we practice things that make children less safe. Lacking knowledge about these topics does that. You’re not protecting them. You’re endangering them.