This effect consists of several componenets. Shaders for the grass trees and most objects that would move with the wind. They are controllable by a single directional vector and parameters like speed rate of gusts among other parameters are avaiable to the user. I've also incorporated wind forces that inheret the same values to be able to simulate objects blowing in the wind.
Later on in the project, I took inspiration from Ghost of Tsushima and made the wind move towards the objective in the game. You can see the red dot indicating the objective in this case. The wind redirects the player towards the objective when they have strayed too far from their path.
(I added arrows to the wind to easier visualize it)