The document field on the customer payment journal header and line from the UI, is currently not available on the customer payment journal entity,

It was seen that this field emanates from the Ledger journal table and is available on the ledger journal entity, however as this is required on the payment journal and in cases of data import, this is required for easy reconciliation, this would also be required on the customer payment journal entity itself.

at the moment, this field is not available for addition via data management or excel workbook designer on the entity