At this time, there's an ongoing issue about users not being able to get their Bank of America accounts connected or updated in QuickBooks Online Banking Feed. Rest assured, the Engineering Team is working diligently to have a permanent fix to this behavior.
In the meantime, I recommend contacting the QuickBooks Online Support Team to be added to the list of affected users. By doing this, you'll get email updates on this issue and be notified of when it gets resolved. Please provide the INV-48984 to the agent as your reference. Here's how to get in touch: