Community menu field is added in website_event module. It is used in two inheriting modules, website_event_meet and website_event_track_quiz. There is no other common ancestor for those two modules. In website_event, community menu field should be False and not displayed as it has no real use. Only in those sub-applications it should be computed like other menu fields, and displayed in event views (both event and event type for configuration). PR #56340