Hello there, @andyeden91.
Welcome to the Community family. I'd be happy to help share some insights on how to find or connect to your bank.
Here are some possible reasons why you're unable to see the AMEX credit card listed on the Banks and Credit Cards:
To fix this, let's start with making sure you've selected the correct listing or have tried all possible links. You can search by the banking login URL to ensure you are using the correct listing.
I’m including an article with additional information about unable to find the correct bank in QuickBooks Online.
In the meantime, you may be able to download transactions from your bank's website and upload them to QuickBooks Online.
You may check out these articles for references:
Also, feel free to reach out to our phone support if you need additional help. They have the tools to check your account securely and get this fixed quickly.
Here's how you can reach them:
That should get you back on track.
I'm just a post away if you should have any questions about identifying your bank. I'll be happy to help you further. Have a great rest of your week.