Hi Zain, 

The question you raised has been identified as FR(feature request).

FR 16277 - FR: option to make comments field mandatory in Survey.

I would highly suggest that you raise a service request with our helpdesk, email the adress helpdesk@sysaid.com or you can raise one via SSP( https://helpdesk.sysaid.com) so we can keep track of how many customers/clients want this FR. 

If you need more help, have further questions, or just want to chat about this topic, please don't hesitate to reach out. 

Have a lovely day forward.