Board Thread:Support Requests - Getting Technical/@comment-24190715-20201011160430/@comment-9605025-20201011163257

If you don't remember the name or domain, then there isn't much we can do to help. The only thing we can suggest at this point is to check Special:UserActivity and see if it is listed there.

Fandom periodically closes small inactive wikis. I don't know all of the reasons but among them are the following. If your wiki had just 20 pages and was inactive for 2 years, it very well may have been closed during one of the cleaning rounds.
 * 1) Improve marketability and search rankings - Having a bunch of small irrelevant pages hosted on the platform hurts relevancy rankings and thus interferes with the bottom line. After all, Fandom is a for-profit company.
 * 2) Frees the domain for someone else - Fandom has no way to tell who will and who won't come back. The entire time a wiki remains inactive, the domain cannot be used by anyone else. If this other user has a different topic for which the same domain would also make sense, this becomes an issue.
 * 3) Maintainance costs - For an individual wiki, the maintenance cost is small. However, small costs add up; especially if Fandom were to leave thousands of small abandoned wikis on their platform.