I’m Pedro, I am a monday.com referral partner and project manager who supports companies implementing monday.com and providing consultation and training.
I share hereafter the standard implementation I use to connect low level boards to high level boards using the link and mirror columns.
These are the steps:
You create you low level project ordered in groups and including the relevant columns for the project and the ones you want to appear in the high level board.
You create the high level board and create a column link to the low level board.
You link all the tasks from the low level project to the high level item.
You incorporate the rest of the columns as mirrors, linking then to their low level column.
You will have a summary of the status of each low level project with its due dates and timeline.
To create automations, to know when the whole low level project has been completed, you’ll have to do it from the low level board.
One consideration to take into account is that if you want to create a dashboard, you’ll have to obtain the information from the low level boards since mirroring columns do not appear in dashboard.
I hope it helps. Tell me if you need any additional support.