Pre-order limits while stock is still available

The merchant wants the ability to offer pre-orders even before a product fully sells out, with a specific limit on how many pre-order units can be accepted. Their goal is to let customers buy a mix of in-stock and pre-order quantities in the same order. For example, if a product has 2 units in stock and the merchant sets a pre-order limit of 5, a customer should be able to purchase up to 7 units. The first 2 units would be fulfilled from available inventory, and the remaining 5 would be treated as pre-orders.

This feature would help merchants manage demand forecasting more accurately, prevent overselling, and provide customers with a clear buying experience that supports both immediate and future fulfillment in a single purchase.

If this would be helpful for your store as well, please upvote this request!