MAGENTO 2 SHIPPING PRICE PER PRODUCT
https://www.cynoinfotech.com/product/shipping-price-per-product-magento-2-extension/
When products are added in multiple quantities, the default functionality of Magento adds a shipping charge of every quantity of the cart. But using this shipping price extension admin can set the shipping price of only one product neither quantity. So the admin can set the shipping rate for multiple quantities of the same product that added to the cart. Magento 2 Shipping price per product also has the functionality to set free shipping for customers. When a customer’s cart value reaches a specific amount set by the admin, the customer gets free shipping. This extension is compatible with all kinds of products like configurable, bundle, simple products, etc…