Open the in-game Settings menu
Go to Controls
Find the Mouse or Camera sensitivity settings
Lower the sensitivity
Disable mouse smoothing if available
Check for any keybind conflict on the mouse wheel
Rebind the scroll wheel action if it is causing camera movement
Turn off any controller input if a controller is connected
Disable Steam Input for Dying Light 2
Check your mouse software for scroll wheel macros
Update your mouse driver
Verify game files through Steam
Restart the game after changing settings