Hi there, Paul404. I'll make sure you'll be able to view the cheque payments made in QuickBooks Online (QBO). 

You'll see the list of all the cheques you've recorded in QBO by going to the Expenses tab. From there, the transaction type Bill Payment (Cheque) will show after paying bills. It's the default transaction type for paid bills, regardless of the method used.

I've added screenshots for your reference. 

You may also want to read this article to learn more about entering bills and recording bill payments in QuickBooks Online: Enter and manage bills and bill payments in QuickBooks Online.

Let me know if you require further assistance with bill payments in QuickBooks Online. I'm here to help anytime. Have a good one.