Occasional delays in invoice processing are the most common cause. The sync service runs every 15 minutes and only picks up transactions when activity triggers it.
What to try
Open the affected invoice in the Amend Entry screen and make a minor change — such as adding and removing a space in a field — then save. This refreshes the sync process.
Allow up to 15 minutes for the sync service to run after saving.
If invoices still aren't appearing
If the above steps haven't resolved the issue, our support team will need to investigate — this can involve running scripts or liaising with the hosting or development teams, which cannot be done self-service. For help contacting us, see Get support in Access Approve.