motioNO - Stable Field of View in Minecraft
This client-side mod prevents automatic field of view changes in Minecraft during various character actions. No more sudden FOV adjustments while running, using potions, drawing bows, and other situations that typically affect the viewing angle.
Important note: Starting from version 1.16.2, Minecraft includes a built-in feature for managing FOV effects. You can find the "Field of View Effects" slider in Accessibility Settings and simply switch it to "Off" to achieve the same result as with this mod.
For convenient toggling of this setting directly in-game, you can use the Mod Menu mod.