Add additional meta and role to export CSV - Order Export Import Plugin For WooCommerce (https://www.webtoffee.com/product/order-import-export-plugin-for-woocommerce/)

functions.php

<?php // do not copy this line
/ here 'meta:meta_key_1' is the key used for the internal use.
// meta key 1 is used as the header in csv.
// meta_key_1 is the meta key present in the database

add_filter('hf_alter_csv_header', 'hf_csv_order_add_more_columns', 10, 1);

function hf_csv_order_add_more_columns($csv_columns) {

    $csv_columns['meta:meta_key_1'] = 'meta key 1';
    $csv_columns['meta:meta_key_2'] = 'meta key 2';
    $csv_columns['meta:meta_key_3'] = 'meta key 3';
    $csv_columns['role'] = 'role';
    return $csv_columns;
}

add_filter('hf_alter_csv_order_data', 'hf_csv_order_add_more_data', 10, 1);

function hf_csv_order_add_more_data($order_data) {

    $additional_meta['meta:meta_key_1'] = 'meta_key_1';
    $additional_meta['meta:meta_key_2'] = 'meta_key_2';
    $additional_meta['meta:meta_key_3'] = 'meta_key_3';
    foreach ($additional_meta as $key => $val) {
        $order_data[$key] = get_post_meta($order_data['order_id'], $val, TRUE);
    }
    if ($order_data['customer_id'] === 0) {
        $order_data['role'] = 'Guest';
    } else {
        $user_info = get_userdata($order_data['customer_id']);
        $roles = implode(', ', $user_info->roles) . " ";
        $order_data['role'] = $roles;
    }
    return $order_data;
}