Re-approval based on a specific change

I’m facing a scenario in Purchase Requisition approvals where an approver edits the requisition (for example, during the approval workflow), and the document continues to the next approver without triggering a re-approval from the previous approvers.

The business requirement is to trigger re-approval only when the PR amount is changed, and not for other types of edits (such as description, attachment, or non-financial attributes).

I’ve already reviewed the standard option available under Requisition Business Functions (the checkbox that enforces re-approval on change), but this solution is not suitable for our case since it enforces re-approval for any change, regardless of its impact on the amount.