Get external product through WPUF WC form

/**
* Get external product through WPUF WC form.
* Add this code in your wp-content/themes/child-theme/functions.php file
**/
function wpuf_support_external_product( $post_id ) {

    $product_type = get_post_meta( $post_id, 'product_type', true );

    wp_set_object_terms( $post_id, $product_type, 'product_type' );

}

add_action( 'wpuf_add_post_after_insert', 'wpuf_support_external_product' );
add_action( 'wpuf_edit_post_after_update', 'wpuf_support_external_product' );