Per-item Refund links are hidden when: the order is Unpaid (nothing to refund, checked on the meals-by-unit and subscription-meals tables); the item is already refunded (shown struck-through); the item type has no per-item refund at all (custom meals, by-the-pound, and venues have no Refund column/link on the order page); or, for POS Menu items, the order has no linked customer account (a POS Menu refund needs the order to have a linked customer account, since it refunds to that customer's digital wallet). For Guest Checkout orders paid by card, use the Refunds button in Quick Actions to refund via the Stripe payment page instead.