Tracking orders by items grouped

hey!!
I have a large list of item that the we are ordering by suppliers . So i created a board “to order” with the items to order
And a orders tracking bord. On the orders tracking board my rows are orders which are done by suppliers and include several items.
How can I connect the ordered items directly according to the supplier name so they will appear automatically on the orders tracking board? So the status will also update in both boards
thanks!!