I'll share a method so you'll be able to view the customer ledger in debit and credit format.
In QuickBooks Online, you can run a Journal report. Then, you can customize it to display the Account Receivable (AR) and specific customers. I'll show you how.
Go to the Reports menu.
Type in Journal report.
Click the Customise button.
Enter to select the correct reporting period.
In the Filter section, select the All Account Receivable under the Account dropdown.
You can also select specific customers under the Name dropdown.