WordPress – WooCommerce search customer orders from product name or SKU

I’m trying to create a function inside WordPress to deploy in WooCommerce, so customers can look up for articles they’ve purchased by SKU or name.
The issue: is not working properly since no matter which SKU look for but same results are displayed. In addition to that, the amount of articles purchases it’s always 1 as result.

function search_orders_by_sku_or_product_name_form() {
    ob_start();
    ?>
    <form method="post" action="">
        <input type="text" name="order_search" placeholder="enter SKU o name">
        <input type="submit" value="Search">
    </form>
    <?php
    return ob_get_clean();
}
add_shortcode('order_search_form', 'search_orders_by_sku_or_product_name_form');

function search_orders_by_sku_or_product_name_result() {
    if (isset($_POST['order_search']) && !empty($_POST['order_search'])) {
        $search_term = sanitize_text_field($_POST['order_search']);
        $user_id = get_current_user_id();

        $orders = wc_get_orders(array(
            'customer' => $user_id,
            'limit' => -1,
        ));

        $found_orders = array();

        foreach ($orders as $order) {
            $order_items = $order->get_items();

            foreach ($order_items as $item) {
                $product = $item->get_product();
                if (!$product) {
                    continue;
                }

                $sku = $product->get_sku();
                $name = $product->get_name();

                if ($sku && $name && (strpos($sku, $search_term) === 0 || strpos($name, $search_term) === 0)) {
                    $found_orders[] = $order;
                    break;
                }
            }
        }

        if (!empty($found_orders)) {
            echo '<table>';
            echo '<tr><th>Order</th><th>Status</th><th>SKU</th><th>Name</th><th>Quantity</th><th>Date</th></tr>';
            foreach ($found_orders as $order) {
                $order_data = $order->get_data();
                $order_date = $order->get_date_created();
                $formatted_date = $order_date->format('d/m/Y H:i');
                $order_status = wc_get_order_status_name($order_data['status']);

                echo '<tr>';
                echo '<td>#' . $order_data['id'] . '</td>';
                echo '<td>' . $order_status . '</td>';
                echo '<td>' . $sku . '</td>';
                echo '<td>' . $name . '</td>';
                echo '<td>' . $item->get_quantity() . '</td>';
                echo '<td>' . $formatted_date . '&nbsp;Hs.</td>';
                echo '</tr>';
            }
            echo '</table>';
        } else {
            echo 'Sorry no results.';
        }
    }
}

add_shortcode('order_search_result', 'search_orders_by_sku_or_product_name_result');

Any hint on how to make it work?