WooCommerce - Show purchase note for first product on the thank-you page

<?php
// WooCommerce - Show purchase note for first product on the thank-you page
add_filter( 'woocommerce_thankyou_order_received_text', 'my_custom_thank_you_text', 10, 2 );
function my_custom_thank_you_text( $text, $order ) {
  foreach( $order->get_items() as $item ) {
    $product = $item->get_product();
    $note = $product->get_purchase_note();
    break;
  }
  if( $note ) {
    $text .= '</p><p class="product-purchase-note">'.$note;
  }
  return $text;
}