Board Thread:Support Requests - Designing Your Wiki/@comment-24856656-20200516063739/@comment-1038387-20200516171342

Neither are "core features". They're both custom extensions Fandom made, and UCP wikis run on a fairly vanilla MediaWiki 1.33, as opposed to the heavily modified 1.19 Legacy wikis have. More additions are made all the time; keep an eye on the Tech Update board.