Grass variety Material Overrides in Level Blueprint

hi
Is there a way to call on a specific Landscape Grass Type in the level blueprint, and then access its grass variety index? I am hoping to assign a dynamic material instance to a grass variety’s Override Material settings?
I want to change a texture parameter at runtime, so the Materials Parameter Collection option is not going to be of any use in this instance (because these online set scalar and vector parameters, not texture).