It would be nice if the kanban board supports subtasks? Or at least shows the parent task name. It might be confusing to where the task comes from as during creation in list we could see the nested relationship but in Kanban board its on it's own.
I recommended indicating the parent name of a subtask if it is place in the Kanban board.
By nested task do you mean 1 Having the link (breadcrumb) to the child and parent task visible and clickable in the board plank? 2 Having a n option to INDENT or make INDENTED board planks 3 Having non-actionable tasks/board planks which basically act as labels and do not show up in the task list view ????
(deleted-OmuA), Dec 17, 2019
Hi @weihong.omsa , hit Ctrl or Alt for Mac to toggle on the Advanced mode. This way, the breadcrumbs/path will appear above the task name. Hope this helps.

Peggy, Dec 18, 2019
We have introduced a new feature called Task Bundle, which allows you to group the subtasks under their parent tasks so the task hierarchy will be preserved as it is. Check out this blog post for more information! 😃
Peggy, Dec 13, 2021