The dual emission shader is, in principle, the same as the regular URP shader you would use in your Unity project, only reconstructed and expanded. The setup is thus the same as with any other shader - create a material and assign the dual emission shader to it. Then assign the new material to your in-scene objects. That's it!

Keep in mind that certain post-processing effects (most notably bloom and tonemapping) will have a profound effect on the dual emission effect.

Assign shader to material

Assign material to game object