magento-test/app/code/Magento/Payment/view/adminhtml/templates/transparent/info.phtml

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

/**
 * @var \Magento\Payment\Block\Transparent\Info $block
 * @var \Magento\Framework\View\Helper\SecureHtmlRenderer $secureRenderer
 * @see \Magento\Payment\Block\Transparent\Info
 */
?>
<fieldset id="payment_form_<?= $block->escapeHtml($block->getMethodCode()) ?>" class="fieldset items redirect">
    <div><?= $block->escapeHtml(__('We\'ll ask for your payment details before you place an order.')) ?></div>
</fieldset>
<?= /* @noEscape */ $secureRenderer->renderStyleAsTag(
    "display:none",
    'fieldset#payment_form_' . $block->escapeHtml($block->getMethodCode())
) ?>