view/adminhtml/layout/sales_order_creditmemo_view.xml
<?xml version="1.0"?>
<!--
/**
* PagBank Payment Magento Module.
*
* Copyright © 2023 PagBank. All rights reserved.
*
* @author Bruno Elisei <brunoelisei@o2ti.com>
* @license See LICENSE for license details.
*/
-->
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceBlock name="creditmemo_totals">
<block class="PagBank\PaymentMagento\Block\Adminhtml\Sales\Order\Creditmemo\Totals\PagbankInterest" name="pagbank_interest" as="pagbank_interest"/>
</referenceBlock>
</body>
</page>