Hey there, @brewmavennj.
I'm grateful that you took the time to provide me with an update on the steps that you've tried. I'me here to provide additional insights to get this issue sorted out.
If you're unable to connect or download your bank transactions in QuickBooks Online, It'd be best to try updating your bank manually to refresh the connection between QuickBooks and your financial institution.
If you still can’t download new bank transactions, you can to sign in to your bank’s website from QuickBooks to check if the issue has something to do with your bank.
To do that:
Here's an informative article that you can check out about this process: What to do if bank transactions won’t download.
Also, if you encounter any online banking error, please refer to this article about fixing online banking issues in QuickBooks for more troubleshooting steps: How to manually update an account to fix banking errors.
If the issue persists, I'd suggest reaching out to your financial institution. This is because QuickBooks is dependent on the information that was transferred from your bank.
Keep me posted if you have any other questions with connecting your bank to QuickBooks Online. I'll make sure to get back to you as soon as I can. Have a great week ahead.