Hey buddy, it really depends on your set up, but these assets don't include much geo to allow for deforming for wind. (if I remember right) You could certainly get it working, but you would need to research how to do that in your chosen pipeline/editor version. If you're using URP for example you would need a custom shader and to add some more subdivisions to the grass mesh. Hope this helps, good luck with the project! :)

You're correct, it's not set up for Unity 6 as it was published almost ten years ago. It can be made to work in URP but not out of the box.