Wccftech : Assassins Creed Valhalla now fully supports the PlayStation 5 DualSense controller on PC.
Following the game’s latest updates, we can confirm the new entry in the Ubisoft series fully supports the Sony current generation controller. Both haptic feedback and adaptive triggers now work with the PC version of the game, although you will need to hook the controller with a cable for these features to work.

Source: N4G PC Assassins Creed Valhalla Now Fully Supports DualSense Controller on PC