If the invoice has been approved but cannot be seen in the BACS remittance screen, this could be due to the BACS Reference not being in the supplier record.
Please check that this has been inserted by:
Navigating to Supplier
Select the Supplier in question
Select the Bank tab in the record
Check that the BACS Reference field has the correct entry.
Additionally, for Currency invoices, the supplier bank details must also include an IBAN & Swift Code for the transaction to appear in BACS Remittances