What you move to when you quit Fandom. Super common for games.

Examples:

Fandom: https://noita.fandom.com/wiki/Noita_Wiki

Official: https://noita.wiki.gg/wiki/Noita_Wiki

Fandom: https://terraria.fandom.com/wiki/Terraria_Wiki

Official: https://terraria.wiki.gg/wiki/Terraria

Fandom: https://minecraft.fandom.com/wiki/Minecraft_Wiki

Official: https://minecraft.wiki/

Two of the three Fandom wiki's above are still ranked higher than the official ones on Google.

There isn't one, there are hundreds. Given that you end up on a small fandom wiki, you have no idea where 'the better community' is. You go to your search engine of choice and start clicking random wikis hoping at least one other one has decent info (most are useless).

As a concrete example, Path of Exile moved to https://www.poewiki.net/ (which is a single MediaWiki instance not associated with a larger network). The content is quite good but it took probably 18 months for it to start reliably appearing in google search results.