Reverse transmission is not possible

Why can’t reverseDeliveryCreateWithShipping upload the carrier, causing the backend to be unable to correctly display carrier。
I want:

api param, not have carrier:
{
“labelInput”: {
“fileUrl”: “https://example.myshopify.com
},
“notifyCustomer”: true,
“reverseDeliveryId”: “gid://shopify/ReverseDelivery/1738899616”,
“trackingInput”: {
“number”: “770900143510”
}
}

i upload
image