I couldn't found an endpoint(Shopify API REST or Shopify GraphQL) to get the shipping rates available for a product, quantity, and zip code. The idea is a user in the PDP(Product detail page) select a quantity for a product, type a zip code and after that, I need to render the information (name of shipping and price) in PDP. This functionality is using the Shopify Rates not CarrierService custom
The answer to this was to use Draft Orders to simulate the Order and see the cost of Shipping