Fortnite is an online video game and gaming platform created by Epic Games. It comes with six different game mode variations, all of which have the same overall gameplay and game engine: Up to 100 people compete in the free-to-play battle royale game Fortnite Battle Royale to be the last person standing.
A "skin" is an appearance that players can select for themselves while they play, encompassing their attire, gender, and general look. Over the years, Fortnite has worked with numerous brands and celebrities to create special skins, including the NFL.
The "X" user "ThirstyyDuck" made a fabricated claim that the Oregon Duck, the mascot of the University of Oregon, will be included in Fortnite. As said in their bio, this user is well-known for being a parody and meme page. This allegation is untrue since, as you can see from the image itself, the original source is the same Thirstyy Duck account. If you search for Oregon Duck added to Fortnite, you won't find any evidence of any kind of partnership between the University and Fortnite.
https://www.nfl.com/videos/a-look-at-the-nfl-s-collaboration-with-fortnite-277831
https://twitter.com/ThirstyyDuck
https://en.wikipedia.org/wiki/Fortnite
https://store.epicgames.com/en-US/p/fortnite