Nark isn't credited in this particular Wired article (although he was credited in Thomson's first article for Wired [2]). This is the despite the fact that Nark, as far as I can tell, wrote the first mainstream article about Mostly Harmless and also was the first reporter to determine his identity.
I suppose Nicholas Thomson must have researched it independently for this new wired piece, explaining why it's being released so much later and with no mention of the reporter who "broke" the story.
[0] https://news.ycombinator.com/item?id=25526104
[1] https://www.adventure-journal.com/2020/12/the-mystery-of-dec...
[2] https://www.wired.com/story/nameless-hiker-mostly-harmless-i...