Also how we will get to know this product is restock again.

Then how we will get the Location ID where the Product is Restock?

What If a line item is already fulfilled and then we create a return and restock the product? Then in the refund API, it should be Restock=true. but in the API response I am getting restock false.

I am returning an order, then restock and then refunded. but after restocking when I am retrieving refund using API, I am getting Restock= false, but is should be return