I'd be glad to share with you some information about connecting your bank with QuickBooks, @rob-pinewoodjoin.
Usually, there will be a prompt to connect your bank through the app even if you are already connected to your desktop. When your accounts are connected, QuickBooks automatically downloads your bank transactions.
If you're referring to something else, please let me know by adding further details or a screenshot of the notification. I appreciate any extra information for us to isolate the issue and provide the best solution.
Meanwhile, I'll be attaching these articles for you to learn more about the banking features in QuickBooks. It also includes troubleshooting steps on how to fix errors you may encounter: