You could do this by re-sending the approval request with a note that comments are required, but this is clearly not ideal. We'll look at a better way to do this. Thank you.
You can't call it modern approvals if there is no option to make comments mandatory - Of course it might break integration with email buttons, but hey.... you are microsoft.... you have to do that.... Otherwise it is worthless...
@Stephen : This issue has been Under Review for a while, could you please provide a status update? We have lots of business cases where comments are required and have received complaints about this limitation of Approvals from our business users.
You could do this by re-sending the approval request with a note that comments are required, but this is clearly not ideal. We'll look at a better way to do this. Thank you.