Users configure their very own shipping rates in their eCommerce stores. Although there isn't an automated option for this, you can make revisions using the help desk of your store platform.

Shopify - Setting up and managing your shipping and delivery · Shopify Help Center

WooCommmerce - Setting up Shipping Zones - WooCommerce Docs

CommerceHQ - Managing Shipping Rates and Zones

BigCommerce - Shipping Setup