Shipping methods are loading from third party api

Hello,
I have woocommerce site and we are using bigbuy dropshipping in our site and products are synced from bigbuy and all available shipping methods are dynamically added when we add postcode on product page as per this plugin shortocode, we have also enabled wp-rocket and Load user location data by ajax to avoid page caching is also enabled as per the suggestion but we want to enable Auto calculation of shipping method and if we enable this option than it is only load the shipping methods which are created from woocommerce > shippping that we don’t want to show, and then we add pincode then the actual shipping methods are shown.

So can you help me to show Auto calculation shipping methods that are loading from Bigbuy instead of showing default shipping methods ?

Thanks