How to enable Move Order requisition approval without item level planner

Is it possible to have a more order requisition approval hierarchy that does not require specifying approver (planner) at item level?

Firstly, it can be cumbersome to define the item planner for each item if we have 1000's of items.

Secondly, an item A1 could be consumed by multiple departments and we would like separate approval hierarchy for each department.

Setting the approver for item A1 at item master / org level would make that impossible.