For anyone who wants a reasonable way to accomplish this: https://getindie.wiki/

Besides everything that the author already said, Fandom is also a cockroach motel from the PoV of the communities using it: it’s trivial to create a new wiki there, but:

• you can’t close it down even with universal agreement of your community
• it has obnoxious forking policies intended to keep the community stuck in Fandom
• the old Fandom wiki surface in search results before anything better that you can pull out, not due to quality but due to aggressive pursuit of SEO cancer from Fandom’s part.

For anyone wanting more info, check the Minecraft Wiki. That wiki migrated out of Fandom, so you can see all the barriers imposed by the roach motel.

Speaking on that. I think that it would be damn great if the Fediverse had deeper integration with self-hosted wikis. Forums like Lemmy are great for discussion, but they suck for long-term storage of information - because eventually the info gets flooded with noise.