We use product tracking with expiration dates for purchased products, everything set up, including Expiration Time etc of products.

BUT: Expiration Date is calculated upon RFQ/PO Confirmation Date (purchase.order.date_approve), which is useless for POs, and not on Receipt Effective Date (stock.picking.date_done) which is what we need and expect. Alternatively

I would appreciate any advice how to fix this issue, preferably with settings or Studio. If this needs coding, well then please give more details :-)

Thanks