https://wccftech.com/fallout-76-beta-fps-cap-fov-lock/

Following the recent update, it appears that the Fallout 76 BETA framerate has now been capped at roughly 63FPS, while the FOV has seemingly been locked.

The recent B.E.T.A. update was a big one, and while many PC players hoped that the update would address framerate and refresh rate issues, Bethesda has instead chosen to enforce a hard framerate cap of roughly 6FPS and adjusting the FOV is no longer possible.