Question Problems getting 2D lighting data in URP Unlit-Sprite

Hi! I'm trying to create a stippling technique effect in shaded regions of my sprites using 2D URP shaders and 2D Experimental Lighting. I can't figure out how to get lighting data for the shader though - there's no guides on custom lighting shaders for 2D URP and the guides for 3D have not functioned very well when I've tried applying them.

Any help would be appreciated!