Fulfillment an order with a GraphQL request

[xHC09x]

Hello,

I have a PHP application that gets orders and sends them to the API server for me automatically.
The issue I encountered while transferring the technology to GRAPHQL was that the server would get an order, go through the line items, and retrieve data about it into GRAPHQL.

I want to save an ID after I've saved the order so I may notify the customer and change the order's status.

I used to be able to save and change orders using the old API, for instance, by going to /orders/ORDER_ID/fulfillments.json, but this approach is currently broken.
In addition, despite reading all the instructions and examples, I was unable to save or edit a GRAPHQL fulfillment.
Can you give me an illustration or other example?