magento-test/app/code/Magento/Review/view/adminhtml/templates/add.phtml

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

/** @var \Magento\Framework\View\Helper\SecureHtmlRenderer $secureRenderer */
?>
<div data-mage-init='{"floatingHeader": {}}' class="page-actions">
    <?= $block->getBackButtonHtml() ?>
    <?= $block->getResetButtonHtml() ?>
    <span class="hidden" id="formButtons">
        <?= $block->getSaveButtonHtml() ?>
    </span>
</div>
<div class="hidden" id="formContainer">
    <?= $block->getFormHtml() ?>
</div>
<?php $scriptString = <<<script

require([
    "jquery",
    "mage/mage",
    "mage/backend/form",
    "mage/backend/validation"
], function($){

   $('#edit_form').mage('form').mage('validation');

});

script;
?>
<?= /* @noEscape */ $secureRenderer->renderTag('script', [], $scriptString, false) ?>