The fandom wiki seems to be more about the similar concepts in scp stories, while the wikidot is for the scp stories.

From the wikidot about different canons:

It’s up to you, as the reader, to decide what you believe and what you embrace as the heart of the universe.

The page called “canon hub” on wikidot lists 48 different canons. If any entry into scp is part of any of them is up to you.