Calling POST request to create new order on shopify always response 200 instead of 201 Created

When I call in postman with body like below

{
  "order": {
    "line_items": [
      {
        "variant_id": 45350427099363,
        "quantity": 1,
        "price": 20,
        "title": "Testing 321",
        "name": ""
      }
    ],
    "customer": {
      "first_name": "tin",
      "last_name": "lo",
      "email": "[email protected]"
    },
    "billing_address": {
      "first_name": "tin",
      "last_name": "lo",
      "address1": "39b ",
      "phone": "53079023",
      "city": "sham sh",
      "country": "hong ",
      "province": "",
      "zip": "0000"
    },
    "shipping_address": {
      "first_name": "tin",
      "last_name": "lo",
      "address1": "39b ",
      "phone": "53079023",
      "city": "sham sh",
      "country": "hong ",
      "province": "",
      "zip": "0000"
    },
    "email": "[email protected]",
    "financial_status": "paid"
  }
}

The response always 200 with the body is list orders insteads of 201 Created and my body

And here is the log from my code

data: '{"order":{"line_items":[{"variant_id":45350427099363,"quantity":1,"price":20,"title":"Testing 321","name":""}],"customer":{"first_name":"tin","last_name":"lo","email":"[email protected]"},"billing_address":{"first_name":"tin","last_name":"lo","address1":"39b ","phone":"53079023","city":"sham sh","country":"hong ","province":"","zip":"0000"},"shipping_address":{"first_name":"tin","last_name":"lo","address1":"39b ","phone":"53079023","city":"sham sh","country":"hong ","province":"","zip":"0000"},"email":"[email protected]","financial_status":"paid"}}'

It’s missing the id and did not create new order

I’ve tried to create a new order in my client’s store, when i tested in my own store with same scope , it’s still created

pls help me to fix this