Display the custom column data on the cart and checkout pages

betrs-display-custom-column.php

/**
 * Display provider if applicable.
 *
 * @return void
 */
function betrs_display_provider( $method, $index ) {

    $meta_data = $method->get_meta_data();
    if( isset( $meta_data['provider'] ) ) {
        echo '<p class="betrs_option_provider">Shipping Provider: ' . stripslashes( sanitize_text_field( $meta_data['provider'] ) ) . '</div>';
    }
}
add_action( 'woocommerce_after_shipping_rate', 'betrs_display_provider', 10, 2 );