Security Question and Answer not working on portals

Hello All,

Our on-prem portal has the setting 'requiresQuestionAndAnswer' set to True in web.config, but the Question and Answer options don't appear when I try to Register through the Customer Portal.

The SignUpLocal view references the RequiresQuestionAndAnswer property but the RegisterLocal view doesn't, what is the difference?

<add name="Xrm" type="Adxstudio.Xrm.Web.Security.CrmContactMembershipProvider, Adxstudio.Xrm"
enablePasswordReset="true"
enablePasswordRetrieval="true"
requiresQuestionAndAnswer="true"
passwordFormat="Encrypted"
requiresUniqueEmail="false"
maxInvalidPasswordAttempts="5"
minRequiredPasswordLength="6"
minRequiredNonAlphanumericCharacters="0"
passwordAttemptWindow="10"/>

but Question and answer fields are not showing up on registration page.

I even tried to add a site setting "Authentication/Registration/RequiresChallengeAnswer" with value as true, still not working.