It’s a known issue. Authentication, authorization, and auditing preauthentication policies (Classic AAA Pre-authentication policy) are deprecated from NetScaler 12.0 build 56.20 onwards and as an alternative. Classic Gateway and AAA policies will continue to remain available with no changes to existing functionality until Q2 2023. Citrix recommends that you move to Advanced policies which has enhanced features and functionalities.
Preauthentication policies and profiles
https://docs.citrix.com/en-us/citrix-gateway/current-release/vpn-user-config/endpoint-policies/preauthentication-policies-and-profiles.html
Notice of Status Change Announcement for Citrix ADC (Formerly NetScaler ADC) Classic Policy Based Features and Functionalities
https://support.citrix.com/article/CTX296948