The behavior that I would like to have in my project is that each "History" may have sub-tasks for each component and these subtasks can move independently within the Kanban board.
I also would like that the estimates of the subtasks join the main "History". That is, if I counted 4h for Android, 3 for iOS and 2 for Back Office to fulfill a “History”, this should have a total estimate of 9h. Is this possible?