Thanks for being here in the Community, @peter.colback.
Currently, we have an investigation about this prompt when the connection is complete. Our product engineers are aware and working on this to get the cause and of it.
The case code is INV-42500, where users are prompt to update and aren't seeing the bank feeds. In this case, I'd suggest reaching our Care Support Team.
From there, they can pull up your account and add it to the list of users who got this issue. Once added, you'll get notifications via email once it's fixed.
You can contact them through this link: Contact QuickBooks. Through this page, click the Green button (Connect to an expert via support page) and then select QuickBooks Online as the product basis. Then follow these steps:
Feel free to comment here if you need further assistance. I'll keep my notifications open. Take care!