Hi @Eben98 ,
Currently, I could not reproduce your issue on my side. But according to the screenshot that you mentioned, it means that you have added a Outlook.com connection in your canvas app or your flow.
Have you added the Outlook.com connection in your app or flow, and then remove it? If you added the Outlook.com connection in your app or flow, then save your app or flow, then remove the Outlook.com connection from your canvas app or flow, even though, the Outlook.com connection has been removed from your app or flow, but when you run the published app, it would still prompt you to create a connection to Outlook.com connection.
Please consider remove the flow connection from your app, and remove the flow on your side. Then re-create a new flow without Outlook.com connection, then re-create a new connection to your flow from your app, re-publish your app, check if the issue is solved.
If the issue still exists, as an fixed solution, please consider modify the configuration file of your canvas app, then remove the unwanted connection definition there. Please take a try with the solution I mentioned in following thread:
https://powerusers.microsoft.com/t5/Building-Power-Apps/Data-Connection-Won-t-Delete/m-p/593998#M186430
Best regards,
