Do all leaders in the Group see all events & activities happening?

A member will see in the programming calendar all events that relate to them in that Unit at that time.

Updated 28 Oct: Leaders will be able to see activities of other Units within their Group as well.

This means that a Scout Leader will see all Scout Unit activities, all Patrol activities for that Unit, all Project Patrol activities that they are invited to, and all Group activities for that Group.