How make Self Evaluation under competency section as a required field

Summary:How make Self Evaluation field under competency section as a required field?

Content (required): On the page composer, I only see 'Show Required' option not the 'Required' option which

actually throws an error If user don't enter any data on the field.

Version (include the version you are using, if applicable): 21C

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