The button is currently not available in the Connect iFrame.
Reason: We're using a service called Userpilot to show the feedback form, which is displayed inside an iFrame itself. It's not possible to show an iFrame inside of an Iframe, that's why we had to deactivate it.
However, it would be useful to display this button (exclamation mark) in the iFrame so that customers can report data issues directly via the iFrame. With this function, the customer does not have to take the workaround and open Connect in a separate tab.