Thank you for posting in the Community. Allow me to help share some insights about the reconciling in QuickBooks Online.
The reconciliation page allows you to compare the beginning balance and transactions listed in your QuickBooks Online company file with your monthly bank or credit card statements to make sure they match. However, that page only shows the deposits and payments, no invoices shows.
To make sure that all the transactions shown on the Reconcile page, let's start with changing the date filter. You can click on the Clear filter / View all option beside custom date to view all hidden transaction.