view.phtml

<div class="order-details-items ordered">
    <?php $_order = $block->getOrder() ?>

    <div class="order-title">
        <strong><?= /* @escapeNotVerified */ __('Items Ordered') ?></strong>
        <?php if ($_order->getTracksCollection()->count()) : ?>
            <?= $block->getChildHtml('tracking-info-link') ?>
        <?php endif; ?>
    </div>

    <?= $block->getChildHtml('order_items') ?>

    <?php if ($this->helper('Magento\GiftMessage\Helper\Message')->isMessagesAllowed('order', $_order) && $_order->getGiftMessageId()): ?>
    <div class="block block-order-details-gift-message">
        <div class="block-title"><strong><?= /* @escapeNotVerified */ __('Gift Message for This Order') ?></strong></div>
        <?php $_giftMessage = $this->helper('Magento\GiftMessage\Helper\Message')->getGiftMessageForEntity($_order); ?>
        <div class="block-content">
            <dl class="item-options">
                <dt class="item-sender"><strong class="label"><?= /* @escapeNotVerified */ __('From') ?></strong><?= $block->escapeHtml($_giftMessage->getSender()) ?></dt>
                <dt class="item-recipient"><strong class="label"><?= /* @escapeNotVerified */ __('To') ?></strong><?= $block->escapeHtml($_giftMessage->getRecipient()) ?></dt>
                <dd class="item-message"><?= /* @escapeNotVerified */ $this->helper('Magento\GiftMessage\Helper\Message')->getEscapedGiftMessage($_order) ?></dd>
            </dl>
        </div>
    </div>
    <?php endif; ?>
</div>