I know this is an old thread, but just in case you’re still looking for an easy and reliable way to sync column changes of your items/subitems between different boards, try Connected Boards Automations!
Here are some of the automations you’re looking for:
It seems like this would be super simple to accomplish @Monday.com
we should be able to create a “Team Board” that aggregates (which is a view of) all tasks assigned to any member of a “Team”. Its all relational… a person is tied to a team and a Team can be tied to a task. Then a “team board” should be able to be configured to display work assigned to all team members”. That would should able to be managed from either that Team board or the Project/Board that item lives on. The connect/mirroring still causes a new item to be created then the item from the other board linked to it… when it really should just be a display of the existing records. Azure DevOps/JIRA both do this. KISS
If everyone who viewed this “Voted” for this it would probably happen faster. Monday didn’t make it super clear so you should vote using the button about the title of the post.