I mean, there's plenty of anime pornography on the Threadiverse too. It's just that sopuli.xyz, your home instance, isn't federated with a number of hosts (and you may not be viewing its "all" feed).

https://sopuli.xyz/instances

Look at the "Blocked instances" tab. You've got stuff like:

https://lemmynsfw.com/

https://kbin.burggit.moe/ (which I can't seem to reach due to some sort of TLS issue, but burggit.moe proper has "Free expression, including the Loli/Shota/Cub variety, are welcome here!", and I assume that this is a gateway to the same material). I definitely remember that burggit.moe used to deal with consentual-nonconsentual material and underage anime material, because it caused lemmynsfw.com to defederate from them.

https://lolicon.rocks/

https://ac.akirin.xyz/ I don't know what content they truck in, and their front page doesn't indicate it, but it looks like the scrolling URLs in the bottom contain a bunch of links to various Fediverse hosts that deal in underage anime porn, and the user icons seem to all be anime girls, so I'm assuming that that might be their thing.

Not going to do a complete list of the blocked instances there, just pointing out that even if you look at your "all" feed on sopuli.xyz, it might not be representative of the Threadiverse as an aggregate.