UE5 Using landscape physical material output with auto landscape layer

Hello !
I made this simple level for me to play around with. A painted my landscape using auto layer blend. (I have a few material functions that are combined in my Landscape material blueprint).
I started implementing footsteps sounds based on the surface type that the player’s on.
I noticed I can set a physical material to an indivudal layer in paint mode and that works fine. However since my whole landscape is made with that auto layer blend I don’t know how to assign physical materials to individuals materials. I know there is a node called “landscape physical material output” but I don’t know how to use it.
I’m attaching few screenshots to demonstrate what my landscape material’s made of.
Would really appriciate some help :))