https://wccftech.com/fallout-76-pc-depth-of-field-fov-anti-aliasing/

Fallout 76 is finally available on PC and consoles in all regions, but it seems like those with the PC version of the game are having a hard time enjoying the game, as this version lacks options that are available in several other games. Thankfully, it’s possible to change some of the game’s setting by messing around with the game’s files.

The Fallout 76 Depth of Field, FOV and Anti-Aliasing settings can be accessed by modifying the Fallout76Custom.ini file which can be found in /Documents/MyGames/Fallout76. Make sure to make a backup of the original file in case something goes wrong during the process. The full procedure has been detailed by Reddit user CrimsonBZD.