About accounting dates for project invoices

Summary:

I want to know the specifications for deriving accounting dates for AR transactions transferred from project invoices.

Content (please ensure you mask any confidential information):

Project invoices are imported into AR transactions.
According to the following document, there are rules for deriving the accounting date for AutoInvoice:
https://docs.oracle.com/en/cloud/saas/financials/24b/faofc/accounting-date-derivation-during-autoinvoice-import.html#Invoices-without-Rules

For project invoices, I thought the default date from the AutoInvoice import job would be used as the accounting date, but when I look at the data, the invoice date of the project invoice is being derived as the accounting date.