It is assumed that the buyer and the seller discuss the lead time on their own, before making a deal.
Contact the seller before requesting an order fulfillment, as sellers are often not available, otherwise you will either have to wait for the seller or cancel your order.
If there is no agreement on the timing between the buyer and the seller, then when resolving any dispute or conflict situation, we make a decision based on the average lead time for similar orders on our site and common sense.