Compatibilidade Dokan e Simulador de Frete para WooCommerce (Luiz Bills)

functions.php

<?php

add_filter( 'wc_shipping_simulator_package_data', function( $package ){

    if( $product_id = $_GET['product'] ?? $_POST['product_id'] ?? false ){
        $package['seller_id'] = get_post_field( 'post_author', $product_id );
    }

    return $package;

}, 10 );