how to create expense report with expense itemization level dff populated using rest api

Summary:

I am trying to create expense report using rest api, where i need to populate the dff fields defined at itemization without any context added. I am not able to find the api payload for the same.

Content (please ensure you mask any confidential information):

I am trying to create expense report using rest api, where i need to populate the dff fields defined at itemization without any context added. I am not able to find the api payload for the same. Even in get operation i could not see the response with these dff fields.

oracle doc: https://docs.oracle.com/en/cloud/saas/financials/24c/farfa/op-expensereports-post.html