Question Converting transform positions of sprite renderers to object positions

Hello, I have a query.

Initially I have 2 sprite renderers. Say A is the parent and B is the child.
I recorded the transform localPosition of B.

Now I want to switch to a shader graph to draw these sprites A and B in one sprite renderer.
The 2 sprites will overlap each other.

I have attached a screenshot for the shader I've written so far. (1st image).
Basically I would like to know how to convert the transform localPosition recorded to object position so I can have same output I would have with 2 sprite renderers.

The 2nd image is the desired output.