The delivery time note shows the delivery time of an available product in the buybox. If a product is out of stock but can be restocked, the note "Ready for shipping in …" can be shown instead.
Go to the "Product pages" tab
Expand the "Delivery information (in the buy box)" block
Scroll to the section "Delivery time"
Enable the configuration "Show 'Delivery time'" and/or "Show 'Ready for shipping in …'"
Save your changes after editing
Tab "Product pages" => Block "Delivery information (in the buy box)" => Section "Delivery time" => Show 'Delivery time'
Tab "Product pages" => Block "Delivery information (in the buy box)" => Section "Delivery time" => Show 'Ready for shipping in …'
detail.deliveryTimeAvailable
detail.deliveryTimeRestock
Note: The delivery time note is displayed if the product is available (stock ≥ "Min. order quantity", or a digital product) and a delivery time is set – provided the "Show 'Delivery time'" configuration is enabled. If the stock is below the "Min. order quantity" but a delivery time and a restock time are set, "Ready for shipping in …" is shown instead, provided "Show 'Ready for shipping in …'" is enabled.
Note: The appearance of both notes follows the "Layout type" in the "Basic configuration" section.