How to make Cancellation Description mandatory when cancelling a Subscription

Summary:

Subscription release notes for 22D states cancellation reason and description can be made mandatory when cancelling a subscription. However no steps are provided to enable the same.

Content (please ensure you mask any confidential information):

Release notes state that the reason description are mandatory while cancelling a subscription. However in our environment only reason field is mandatory. How do we make the Cancellation description field also mandatory.

Version (include the version you are using, if applicable):

24A

Code Snippet (add any code snippets that support your topic, if applicable):