You can force the shipping address to show in the WooCommerce Quote Request plugin by checking this option in the proposal tab:
Please note: This will not add a shipping method to the order. It will only force the shipping address to show in the Quote emails sent to the customer and the store manager. Shipping method can be selected normally by the customer if you are in the RFQ mode. In the “normal mode”, the admin has to apply the shipping in the order edit screen.