No, Wikia does "clean-up" small "abandoned" wikis. However, I don't think this is the case this time around.
HarmonixLol, is this the wiki you are looking for? It looks like it was created by you on August 24th but you haven't made a single edit yet. The only thing that shows on Special:RecentChanges is the automated message welcoming you to your new wiki. If you indeed haven't made any edits yet, that would be why it doesn't show on Special:UserActivity. As Tupka217 said:
It shows all (existing) wikis you've got edits on.
I am not sure why you couldn't search for it. I was able to find it using Google quite easily; first result. Then again, maybe that is because I had already visited the site before searching for it on Google. In the future, if you know the name of the wiki, you can try using /api/v1 to locate it.
The first part of my post was towards Cocopuff2018. It looks like Aassdddai and I cross-posted.
here is the thing about that fandom has a good and fast search engine wich is why is doesnt take soo long for it to show on goolge i once made a website and wanted to get it on goolge whenever i can so i found a tool called goolge submit url enter the link and boom it showed the next day it was on goolge