Customers will see vendor wise Singapore Post shipping on the cart page. This module is dependent on Vendor Multi Shipping Addon of CedCommerce Multi-Vendor Marketplace for Magento 2, so you must install multi shipping before the installation of Vendor Singapore Post
shipping addon.
In the attached snapshot you can see that there is a product in the cart associated with a vendor. Here you will see that vendor “John” has enabled Singapore Post shipping for his products. So the customer will see vendor wise Singapore Post shipping for this vendor. If any vendor has not enabled any shipping method then the customer will get the rates defined by the admin for the vendor’s products.