How to route hold notifications when assigned employee is terminated

Summary:

Currently we have some invoices pending on hold assigned to user who already left the organization and how we route all invoices to active users in Queue?
I tried to ran "Reassign Purchasing Documents" and changed the buyer but not working as PO is already closed. Also i ran "Reassign Pending Approvals for Terminations and Correct Invalid Supervisor Assignments" but don't see any change.

Is there anyway to achieve it?

Reassign Purchasing Documents

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