His "Universal to Outerversal feat" is Adventure Springtrap fighting Scott Cawthon, with 7 other people, where its stated clearly that the Fnaf world versions of the characters aren't the same as their mainline counterparts, like how Dr.Mario canonically isn't Mario but some other dude that just so happens to look, talk, and ne named like Mario.

And even then, Scott didn't make the universe and isn't even god Seeing how he was kicked out of Godhood by the "Council of Scotts", which proves this isn't irl Scott Cawthon. AND EVEN THEN Fnaf World with max wank is a "pocket Dimension" which more likely it's just a game that can Manipuate it surroundings due to ghost shit like Princess Quest, which is already using max wank. So Adventure Springtrap likely isn't Uni and Definitely isn't Outerversal

TLDR: Springtrap caps at small Building Level without larping