Use Position hierarchy for approval in cross functional area

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We are using position management features using HCM Position hierarchy. However Position tree(not position hierarchy) is required approval configuration in HCM and in other areas like PO/PR in Procurment/Finance. As HCM is the unified place for maintaining positions , it is adding maintenance efforts for users to maintain both HCM position hierarchy and Position tree in any reorganization scenarios.

How are you handling such scenarios ?