Shared Updates and Subtasks for connected Items

I would like to propose a feature that allows shared and mirrored updates & subitems from one board to the next.

Our Case:
We use a main board to create tasks in a second board, all these tasks have updates and subitems. Currently we create the main task in the first board and then connect it to the second board using an automation. After the task is created in the second board we have to go to that board and add relevant updates and subitems.
If we could add everything on the main board that would really help with our workflow.