Welcome to the QuickBooks Community, @Jen4350.
Let me share some possible reasons why all expenses entered in QuickBooks aren't showing on the Match transactions page.
One of the reasons is that the expense isn't recorded under the specific bank account. To verify, you'll need to go to the bank register and confirm if the transactions are there. To do so, you can go to the Chart of Accounts and click the Account history of the bank.
However, if you see those transactions in the bank register, you'll also want to confirm if they're not matched to another downloaded transaction or have been reconciled. There will be two Green squares in the Reconcile status column if they've been matched. Additionally, an R will signify that it's reconciled. Both of these will prevent a transaction from being able to be matched.
In case these transactions are in the register and don't have anything preventing them from being matched, I suggest clearing your browser's cache. It's possible that your browser had a data issue that caused QuickBooks to act weirdly.
To learn more about categorising and matching transactions, you can check out this article for more details: Categorise and match online bank transactions in QuickBooks Online.
Please know that I'm just a reply away if you need any further assistance matching transactions. Have a good one, @Jen4350.
