I have couple of shipping methods DHL & FedEx, if selected products exits in cart show only selected shipping method, how to archive using shopping cart pricing rule or any other way to do this?

Here is a must-try tool on Magento 2 store: Shipping Restrictions. Let see how it brings your shipping system the best performance.
This module is super recommended for online stores who provide multiple shipping methods and they have to deal with the enormous amount of customers. In addition, the add-on is built exclusively for stores selling mass and various products quantity daily. Since it assists store owners to control their shipping system, it also contributes to business efficiency and profitability.

Elsner Magento Extensions can bring magic to your ecommerce store.

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