Woocommerce Tab with Metabox Values Table

<?php
// 1) Install Metabox Plugin Free Version
// 2) Create Metaboxes with online generator https://metabox.io/online-generator/ or edit this snippet to your needs

add_filter( 'rwmb_meta_boxes', 'woonutrition_register_meta_boxes' );

function woonutrition_register_meta_boxes( $meta_boxes ) {
    $prefix = '';

    $meta_boxes[] = [
        'title'      => esc_html__( 'Nutrition Info', 'woonutrition' ),
        'id'         => 'nutrition_info',
        'post_types' => ['product'],
        'context'    => 'side',
        'fields'     => [
            [
                'type' => 'text',
                'name' => esc_html__( 'Nutrition Value Demo1', 'woonutrition' ),
                'id'   => $prefix . 'nutrition_value_demo1',
                'desc' => esc_html__( 'This field is just for demo purposes', 'woonutrition' ),
            ],
            [
                'type' => 'text',
                'name' => esc_html__( 'Nutrition Value Demo2', 'woonutrition' ),
                'id'   => $prefix . 'nutrition_value_demo2',
                'desc' => esc_html__( 'This field is just for demo purposes', 'woonutrition' ),
            ],
            [
                'type' => 'text',
                'name' => esc_html__( 'Nutrition Value Demo3', 'woonutrition' ),
                'id'   => $prefix . 'nutrition_value_demo3',
                'desc' => esc_html__( 'This field is just for demo purposes', 'woonutrition' ),
            ],
        ],
    ];

    return $meta_boxes;
}


// 3) Add woocommerce Nutrition Tab

add_filter( 'woocommerce_product_tabs', 'woo_nutrition_tab' );

function woo_nutrition_tab( $tabs ) {

    // Adds the new tab
    $tabs['nutrition_tab'] = array(
        'title'     => __( 'Nutrition Tab', 'woonutrition' ),
        'priority'  => 50,
        'callback'  => 'woo_nutrition_tab_content'
    );

    return $tabs;
}
// 4) Add woocommerce Nutrition Tab Content
function woo_nutrition_tab_content() {

    // Nutrition tab content
    echo '<h2>' . __( 'Nutrition Tab', 'woonutrition' ) . '</h2>';
    // Create markup for table begin
    echo '<table class="woocommerce-product-attributes shop_attributes">
    <tbody>';

    // Check if field has value and show it in table row
    if(rwmb_meta('nutrition_value_demo1')) {
        echo '<tr class="woocommerce-product-attributes-item woocommerce_nutrition_item">
                <th class="woocommerce-product-attributes-item__label">nutrition_value_demo1</th>
                <td class="woocommerce-product-attributes-item__value">'. rwmb_meta('nutrition_value_demo1') .'</td>
              </tr>';
    };
    if(rwmb_meta('nutrition_value_demo2')) {
        echo '<tr class="woocommerce-product-attributes-item woocommerce_nutrition_item">
                <th class="woocommerce-product-attributes-item__label">nutrition_value_demo2</th>
                <td class="woocommerce-product-attributes-item__value">'. rwmb_meta('nutrition_value_demo2') .'</td>
              </tr>';
    };
    if(rwmb_meta('nutrition_value_demo3')) {
        echo '<tr class="woocommerce-product-attributes-item woocommerce_nutrition_item">
                <th class="woocommerce-product-attributes-item__label">nutrition_value_demo3</th>
                <td class="woocommerce-product-attributes-item__value">'. rwmb_meta('nutrition_value_demo3') .'</td>
              </tr>';
    };
    // Create markup for table end
    echo '</tbody>
</table>';
}