Shader Graph Material: Feather Edges Image Effect

Hi, I am trying to create a simple effect to create feather edges on the image using Reality Composer Pro. Something like this:

As you can see it has softer edges on all sides that dissolves into transparency with the background.

this is what I have been able to achieve on my own.

I want to use the "feather" input node value (float) from 0.0 to 1.0 to increase or decrease the strength of the feather edges.

Previously asked, see here How can I achieve this effect using SwiftUI or ShaderGraph? - https://developer.apple.com/forums/thread/774543?answerId=825375022#825375022

Shader Graph Material: Feather Edges Image Effect
 
 
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