magento-test/app/code/Magento/Checkout/view/frontend/templates/button.phtml

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
?>
<?php /** @var $block \Magento\Checkout\Block\Onepage\Success */ ?>

<?php if ($block->getCanViewOrder() && $block->getCanPrintOrder()) :?>
    <a href="<?= $block->escapeUrl($block->getPrintUrl()) ?>"
       class="action print"
       target="_blank"
       rel="noopener">
        <?= $block->escapeHtml(__('Print receipt')) ?>
    </a>
    <?= $block->getChildHtml() ?>
<?php endif;?>