magento-test/app/code/Magento/Backend/view/adminhtml/templates/menu.phtml

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
?>

<nav data-mage-init='{"globalNavigation": {}}' class="admin__menu">
    <?= /* @noEscape */ $block->renderNavigation($block->getMenuModel(), 0, 12) ?>
</nav>