It's blocked by lemmy.world, like half the fediverse is.

Mander and most other instances don't block them.

Lemmy.world has the problem of being large and successful. As a result they block a lot of instances and topics before they become a potential problem. They want to avoid litigation, and since they’re one of the largest instances they believe that they are a prime target should a crackdown on the fediverse happen.

You would need to view the instance directly, not through lemmy.world due to the lemmy.world admins blocking it. I'm not sure if lemmy.world admins block links to it too but if you need a link look up all the Lemmy instances at https://lemmyverse.net/?order=active

Divisions by zero is currently the 7th most active Lemmy instance.

From there you'd just have to decide if you want to create an account at that instance itself, or just create an account at a different Lemmy instance that isn't blocking piracy communities. I think lemmy.world admins may be the only ones actively blocking piracy communities.. I haven't heard of other admins at other instances doing that.