Storefront API now supports per-market Fulfillable Inventory

As of Storefront API version 2024-04, you can use the @inContext directive to query product and productVariant fulfillable inventory for specified market country. The Fulfillable Inventory feature must be enabled.

query Contextualized @inContext(country:CA){
  product(id:"gid://shopify/Product/1" )
  {
        availableForSale
    	totalInventory
        variants(first:1)
        {
          edges
          {
            node
            {
              id
              availableForSale
              quantityAvailable
              currentlyNotInStock
  
            }
          }
        }
      }
}

Learn more about Fulfillable Inventory on Shopify help docs.