Hi,

To view the delivery status of the sale order, we need to enable the delivery method in the settings.Use the following step to enable delivery status in Odoo 15:

1. Install the inventory and sales module from the Apps menu.

2. Enable delivery methods in Inventory -> Configuration -> Settings.

3. Configure and manage delivery methods under Inventory -> Configuration -> Delivery Methods.

4. Enable delivery methods in Sales -> Configuration > Settings to integrate with sales orders.

5. Track delivery status in sales orders under Sales -> Orders, and in inventory transfers under Inventory -> Operations -> Transfers.

Hope it helps.