https://wccftech.com/far-cry-6-wont-have-a-map-editor-though-devs-confirm-an-endgame-of-sorts/

Far Cry 6 won't have a map editor or anything like Far Cry Arcade. The news came directly from Ubisoft's Alexandre Letendre, Game Director on Far Cry 6, who participated in a Reddit AMA just yesterday alongside fellow developers Navid Khavari (Narrative Director) and Benjamin Hall (World Director).

No, Arcade will not come back. Removing this mode from our plan was a difficult decision, but allowed us to focus our efforts on the main campaign, transporting players into the heart of a modern-day guerrilla revolution.