Actually, HN has the same issue than Reddit here : it locks threads.

But now I wonder why duckduckgo never seems to show hn results (unless restricted to it of course) ? I have searched hn before as it contains a lot of "Lore" as GP calls it, some of it quite helpful !

I guess that hn is a bit to reddit what is IRC to Discord : because of its focus and lack of features, it's ironically better in this context because most people won't even try to use it for something more serious than "post-it's on the fridge door".

HN may be like the forums for Advanced Custom Fields, which weren't even indexed. I sent a mail to them and submitted added themselves to Bing, which in turn meant being added to DDG afaik.