How to code display add field in 3 column.

function custom_b2bking_show_column_data($column, $post_id) {    switch ($column) {        case 'company_name':            // Lấy dữ liệu từ post meta            $company_name = get_post_meta($post_id, 'b2bking_custom_field_618469', true);            if (empty($company_name)) {                $company_name = get_post_meta($post_id, '_b2bking_custom_field_618469', true);            }            echo !empty($company_name) ? esc_html($company_name) : 'N/A';            break;
        case 'customer_email':            $customer_email = get_post_meta($post_id, 'b2bking_request_custom_quote_email', true);            if (empty($customer_email)) {                $customer_email = get_post_meta($post_id, '_b2bking_request_custom_quote_email', true);            }            echo !empty($customer_email) ? esc_html($customer_email) : 'N/A';            break;
        case 'customer_phone':            $customer_phone = get_post_meta($post_id, 'b2bking_custom_field_617057', true);            if (empty($customer_phone)) {                $customer_phone = get_post_meta($post_id, '_b2bking_custom_field_617057', true);            }            echo !empty($customer_phone) ? esc_html($customer_phone) : 'N/A';            break;    }
}
add_action('manage_b2bking_conversation_posts_custom_column', 'custom_b2bking_show_column_data', 10, 2);
// 2️⃣ Thêm các cột mới vào bảng Conversations
function custom_b2bking_add_columns($columns) {    $columns['company_name'] = __('Tên Công Ty', 'b2bking');    $columns['customer_email'] = __('Email', 'b2bking');    $columns['customer_phone'] = __('Số Điện Thoại', 'b2bking');    return $columns;
}
add_filter('manage_edit-b2bking_conversation_columns', 'custom_b2bking_add_columns');
// 3️⃣ Lưu dữ liệu khi khách hàng gửi form
function save_b2bking_custom_fields($post_id) {    if (get_post_type($post_id) !== 'b2bking_conversation') {        return;    }
    if (isset($_POST['b2bking_request_custom_quote_email'])) {        update_post_meta($post_id, 'b2bking_request_custom_quote_email', sanitize_email($_POST['b2bking_request_custom_quote_email']));        update_post_meta($post_id, '_b2bking_request_custom_quote_email', sanitize_email($_POST['b2bking_request_custom_quote_email']));    }
    if (isset($_POST['b2bking_custom_field_617057'])) {        update_post_meta($post_id, 'b2bking_custom_field_617057', sanitize_text_field($_POST['b2bking_custom_field_617057']));        update_post_meta($post_id, '_b2bking_custom_field_617057', sanitize_text_field($_POST['b2bking_custom_field_617057']));    }
    if (isset($_POST['b2bking_custom_field_618469'])) {        update_post_meta($post_id, 'b2bking_custom_field_618469', sanitize_text_field($_POST['b2bking_custom_field_618469']));        update_post_meta($post_id, '_b2bking_custom_field_618469', sanitize_text_field($_POST['b2bking_custom_field_618469']));    }
}
add_action('save_post', 'save_b2bking_custom_fields');