Making sure your bank transactions are downloaded is my priority, @ed33.
Can you tell me the name of the bank that is not displaying your transaction lists? This is for me to further check on its root cause.
In the meantime, here are the possible reasons why you're not seeing your transaction list:
I'd suggest manually updating your connected bank account to get the most current view of your data. Here's how:
If you're still unable to receive updates, you can log in to your bank’s website and download an updated list of your transactions. Once completed, you can upload them to QuickBooks Online via the WebConnect feature. You can read through this article that will walk you through the whole steps: Import Bank Transactions Using Web Connect.
Once done, it's time to review and categorize each transaction. On the other hand, I've added these articles to help you resolved issues when managing your downloaded bank transactions:
Know that you're always welcome to post here in QuickBooks Community if you have any other concerns. We're always here to help you out.