Welcome new user, ok so about the pages, you could make a page of your own whatever you want, but the pages you're making must not be too short, for example.
"Tinky winky is a purple bipedal monster who resides in level telletubbies, & would kill any human it sees with its TV."
Pages within the backrooms fandom wiki must have good quality & effort to exist here, the reason why is due to rules.
So yeah, wanna make a page, just remember it must have a good amount of effort. Enjoy your stay :)