The Lab is an Uncommon Fortnite Loading Screen from the Mecha Kitty set. The Lab was available via the Battle Pass during Season 13 and could be unlocked at Tier 51.
How-to Get the The Lab Loading Screen
The Lab is part of Season 13. If that season is still currently in the game, you can obtain this item by purchasing and/or leveling up your Battle Pass.
Mecha Kitty Set
The Lab is part of the Mecha Kitty set! You can find all of the items that belong to it below.