My invoice's status is Validated and its workflow approved. Why hasn’t the invoice been paid?

Payments are processed on Wednesday and Friday of each week. The invoices selected are those that have a due date within four days of the payment process date (i.e., payment process date 01/05/2022 invoice through 01/09/2022 will be selected). It is important to remember that invoice due dates are based on the net payment terms assigned to the supplier profile or purchase order.