Hi,

In Odoo 16, you can create a 2-step internal transfer process to complete the wirehouse transfer. Go to the "Inventory -> Operations -> Internal Transfers" menu.
1. Click the "Create" button to create a new planned transfer order.
Select the w1/stock as the source location (Warehouse A) and the physical location/inter warehouse-transit location as the destination location. Add the product you want to transfer (oranges) and specify the quantity (5). And validate the transfer. 
2. Create another transfer with source location as physical location/inter_warehouse-transit as source location and w2/stock as destination and Add the product and validate it.

Hope it helps

Hi Alex,

Please check the Odoo documentation on inter warehouse transfer using replenishment

Transfer products between warehouses using replenishment

Regards