User blog comment:MisterWoodhouse/The first Unified Community Platform release is now live for NEW wikis/@comment-75.91.70.44-20200318201023/@comment-24155515-20200319144906

Do you mean the Achievements extension? Last I heard it was deprecated and only enable-able/disable-able by staff so it's quite possible no replacement would be available for the higher-version UCP wikis, but wikis still on 1.19 could theoretically have it enabled if you contact staff.