Change event to document.body for dynamically added elements

gistfile1.txt

<?php
/**
 * Plugin Name: ExamplePlugin
 * Version: 1.0.0
 */
if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

add_action(
    'admin_print_footer_scripts-woocommerce_page_wc-orders',
    function () {
        ?>
        <script>
            jQuery(function ($) {
                $(document).ready(function () {
                    var $title = $('h1.wp-heading-inline');
                    var $orderData = $('#woocommerce-order-data').find('.inside');
                    var $buttonNoModif = $('<button class="page-title-action">Run Test before pull request, then try to edit Billing adress</button>')
                        .on('click', function () {
                            $orderData.empty();
                            $orderData.append('<div class="loading-content"><span class="spinner is-active"></span></div>');

                            $.ajax({
                                url: woocommerce_admin_meta_boxes.ajax_url,
                                data: {
                                    order_id: woocommerce_admin_meta_boxes.post_id,
                                    action: 'test_51185',
                                },
                                type: 'POST',
                                success: function (response) {
                                    $orderData.empty();
                                    $orderData.append(response);
                                }
                            });
                        });
                    var $buttonWithModif = $('<button class="page-title-action">Run Test with pull request, then try to edit Billing adress</button>')
                        .on('click', function () {
                            $orderData.empty();
                            $orderData.append('<div class="loading-content"><span class="spinner is-active"></span></div>');

                            $.ajax({
                                url: woocommerce_admin_meta_boxes.ajax_url,
                                data: {
                                    order_id: woocommerce_admin_meta_boxes.post_id,
                                    action: 'test_51185',
                                },
                                type: 'POST',
                                success: function (response) {
                                    $orderData.empty();
                                    $orderData.append(response);

                                    if ('undefined' !== typeof window.wcOrderMetaBoxes) {
                                        window.wcOrderMetaBoxes.wc_meta_boxes_order.init();
                                    }
                                }
                            });
                        });

                    $title.after($buttonWithModif);
                    $title.after($buttonNoModif);
                });
            });
        </script>
        <?php
    },
    999
);

add_action(
    'wp_ajax_test_51185',
    function () {
        $order_id = absint($_POST['order_id']);
        $order = wc_get_order($order_id);

        WC_Meta_Box_Order_Data::output($order);

        wp_die();
    }
);