Using Magento 2 Delivery Availability Checker Extension, admin can set whether COD is available for particular zip/postal code or not. This setting is available for each postal code, hence it adds a useful feature for the country where COD option is available for customers but might not be safe for the delivery man.

Read this guide on How to Configure Delivery Availability in Magento 2 to setup this Magento 2 Delivery Availability Checker Extension.

Here are the few more resource to help you get most out of this Magento 2 Delivery Availability Checker Extension.

• How to Add Contactless(No-Contact) Delivery in Magento 2
• How to Add Delivery Date to Checkout Page in Magento 2
• How to Setup Cash on Delivery (COD) Payment Method in Magento 2