I assume you must have blocked the anime lemmy instance, or ml doesn’t federate with it. It’s not contained to reddit by any means.

There’s a small cadre of users posting fan art of various shows and games on lemmy too, where I regularly can tell at a glance that whatever artist they’re posting also does hentai. Sometimes what they’ve posted is even just the one SFW image from a set. Thank god for the block button.