I second this, especially since the data is there already, you just can't easily see it.
This would be highly beneficial and Keycloak already allows you to click "Unable to scan?" and then shows you the secret which you can copy. It's not an image where you have to type it in. This is needed, especially in environments where the user doesn't have access to a phone or the ability to use a QR reader. Also using apps like Authy, at least the plug-in for a browser doesn't have a QR reader built-in.