Based on the JSON provided, the “fulfillment_order_id” and “id” values in the “fulfillment_order_line_items” array do not come directly from the order. They are instead generated by Shopify when creating a fulfillment for an order.
Here is a brief explanation of each value:
“fulfillment_order_id”: This value is generated by Shopify when creating a fulfillment for an order. It represents a unique identifier for the fulfillment order, which is used to track and manage the fulfillment process.
“id”: This value represents the unique identifier for the line item in the fulfillment order. It is also generated by Shopify when creating a fulfillment for an order.
When creating a fulfillment for an order, you will need to specify the “order_id” value, which comes from the original order. You will also need to specify the “line_items” array, which contains the line items that are being fulfilled. Each line item in the “line_items” array will have its own unique “id” value.