Due to the ephemeral nature of 4chan, specific threads expire quickly (often within hours or days), but here is a report on the current state and locations for such content: Primary Locations on 4chan /trash/ (Off-Topic/Fetish):
In the sprawling, chaotic ecosystem of the internet, few corners are as misunderstood—or as meticulously curated in their own bizarre way—as the /b/ and /c/ (Cute/Male) boards of 4chan. Among the sea of shitposting, rage comics, and ironic nihilism exists a niche, surprisingly dedicated community: the ABDL (Adult Baby/Diaper Lover) contingent. 4chan abdl thread high quality