https://www.polygon.com/2018/11/4/18061586/fallout-76-beta-mods-pc

Mods for Fallout 76 are already available, and the game is still only in its beta.

As spied by PC Gamer, a baker’s dozen of cosmetic mods for the Fallout 76 B.E.T.A. are on Nexus Mods, the modding supermarket where Bethesda’s Fallout and Elder Scrolls series dominate the thousands of files available for free.