Glad to have you here on the Community page. Let's figure the possible reasons why transactions are no longer showing up on your accounts.
QuickBooks sends the downloaded transactions to the accounts linked with QuickBooks. If you have multiple accounts and needs to download data to just one account, only connect the parent account. If the transactions download to the individual sub-accounts, connect the subaccounts and not the parent account.
Since your accounts don't display the charges, you can manually update them through the Banking page. I can guide you on how.
Open your QuickBooks Online account, then click on Banking at the left pane.
Choose Banking, then tap your bank account.
Click on Update.
Repeat the steps for the other accounts.
To learn more about setting up your bank or credit account with multiple subaccounts as well as updating bank accounts manually, feel free to open these articles: