Question Material multiplication

I am having two simple effects: one applies noise to a texture and the other one masks it with "rays". When I put those two materials on a SpriteRenderer (using custom script) they overlap with each other. Is there a way to "multiply" two materials so that, in this case, I would have noise applied only to masked areas.

Of course I can convert the shaders into subgraphs and then create a third shader that would multiply them, but this solution does not scale as the number of different shaders grows so I am curious about the general solution.

 

Unity's 2D Renderer settings provide both addition and multiplication options, but that seems to apply only to 2D lights.