How can we override buyer name on dropship PO using EFF on sales header?

Summary:

There is an ask to override the buyer's name on dropship PO using buyer name as EFF in Sales Header. Can we use service mapping and algorithms to accomplish this? Idea is to capture the buyer's name on sales order EFF and override the same on purchase request line level seeded field- Suggested Buyer so that the PO created uses the same as the buyer name. Please share any documentation/ video which can help me with this configuration.

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