UE5 Grass Material. This is available on the Marketplace here: https://artstation.com/a/20610960

Substance Designer was used to generate procedural clusters for the textures.
Here I go over wind effects, reactive foliage, colour variation per instance as well as world space and distance blending. I hope this is of some help to people!

Shoutout to Daniel Wenograd for the first method for the reactive foliage: https://www.artstation.com/dwenograd