I'm here to ensure your bank account is linked to QuickBooks Online.
Changing your bank account login credentials helps reconnect your bank in QuickBooks. Just make sure to change the information on your bank's website first to reflect the changes.
Let me guide you through on how to accomplish this:
You can read through this article for additional information: How to update your bank account sign-in information.
For other bank accounts that disappear on your bank feeds, it's possible they've been disconnected. Let's find your financial institution using the URL you used when logging into their website.
Here's how to find the right account:
Please check out to this article for more details: How to identify the correct bank.
Keep me posted on what the results are. I'm here anytime you need help.