When the approver click the request in this section, approver is having 'Approve', 'Reject' buttons and a link to the service form submitted. Without opening the form, the approver can approve a request.
I have ISF validations inside the form during the authorization moment. How to restrict an user from approving the request using the approve button in the "My Pending Approvals" ?
I found the answer by myself. The "do_action" function on authorizationservices.js is being called. If you can put your custom restriction here, you can restrict the approver