Good day, @anthonyallison-a.
Can you share with me the name of the bank you're trying to update in QuickBooks Online? Also, can you help me identify if the issue you're referring to is about updating the actual banking info in the COA or if the bank feeds itself (downloaded banking transactions).
Any further info would be much appreciated. Please get back to me and add your details to this thread. I'll be here to help you fix your QuickBooks banking concern.