Fade foreground / Hole shader

I'm pretty new to shaders and the shader graph, but from what I can tell most of the examples of shaders that aren't specific to shader graph don't really apply when creating shaders that way. I found the below which does pretty much everything I need, but it doesn't indicate how to go about it in shader graph.

Can something like this be implemented in the Shader Graph?

https://gamedev.stackexchange.com/questions/152824/how-can-i-create-a-see-behind-walls-effect

 

Since my game is 2D, and I really just need to "carve a hole" in a Tilemap, it turns out that using a Sprite Mask component fulfils my needs completely. I'm still somewhat interested in the topic, but have moved on with the mask approach. I'm not sure why I didn't know about that component, but I wish I had discovered it sooner