The wiki has been dead for several months, and like the blogspot being replaced with a proper website as has been planned for around the same time, nothing has been done about it. Past the semi-backup you found, there isn't any real wiki for the game, and especially not anything that could be considered up-to-date. This is probably because, at this point, the game's community basically only exists within the sphere of the game's discord, with a small subset here as well; random people aren't really finding this game anymore, and definitely not talking about it enough to want to keep a wiki maintained for other non-discord people.
However, the mods for the fandom wiki hasn't been active since ~2017, and the last changes were in December by some guy advertising the backup site. Maybe you can just jam a shit ton of edits there and bring the site up-to-date? None of the content pages are locked. And, if it somehow rouses one of the mods to rollback/ban you, you can just take the source code, and then we can all laugh at them and call them losers here for their insistence on keeping their own wikis dead and useless.