I don’t know where you heard that. If Fandom Staff copy paste content from this wiki to the old one, we legally have the right to take it down, as they would be violating our license.
The current wiki projects are one part of the plan. We split some pages into more meaningful chunks for better ranking and we have a bunch of new content to add even before the chapters release.
More direct way of helping the wiki’s searchability is to get as many websites as possible to link to it, signifying to Google that it is used. However, you should be careful when doing this, because I don’t want anyone to think we’re sending spambots to other websites to spam the link to our wiki. If the link is relevant and useful in the context of that website and page, you could add it. Also, if the website was previously linking to the old wiki, you could change it to the new wiki. This obviously won’t work very well for Fandom wikis, because Fandom Staff will likely notice you doing that eventually and consider it spam, but any other wiki network may be willing to change where they are pointing to.
Less direct way of helping the wiki’s searchability is to get all willing contributors over here. More contributors means more new content, and better ranking in search engines. I think the amount of contributors we have now is already very good! We preserved the vast majority of contributors that we had on the old wiki. But if you spot any contributors who don’t know we’ve moved, you can point them to the new wiki. Obviously, if they don’t want to move, that is also fine.
Ultimately, this is the hardest task we have of all on this wiki. I don’t have a 100% working plan that will definitely help us beat Fandom in X amount of months. If Minecraft Wiki haven’t succeeded yet, and with a game that is constantly updating, that means we still have a long way to go. But eventually, I think we’ll get there.