How to setup AME for PO Approval for Emp-Supervisor setup, can we use existing approval setups

Hi Team,

I have a requirement to set up AME for PO approval. We use employee-supervisor hierarchy. I am looking for some POs those came through planning sourced requisitions, only to be routed through AME. I am able to do that by creating a new style and submitting the PO through BWC. Before that I also change the style_id of PO so that I can submit the approval using BWC. The second part of this requirement is to get approval first from the buyer's supervisor hierarchy, then get approval also from requester's supervisor hierarchy.

Please suggest me best way to achieve the second part (AME approval setup):