view/adminhtml/layout/mundipagg_mundipagg_plans_create.xml
<?xml version="1.0" ?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<head>
<css src="MundiPagg_MundiPagg::css/jquery-ui.min.css" />
<css src="MundiPagg_MundiPagg::css/mundipagg_style.css" />
<script src="MundiPagg_MundiPagg::js/recurrence.js"/>
</head>
<body>
<referenceContainer name="content">
<block class="MundiPagg\MundiPagg\Block\Adminhtml\Recurrence\Plans\Plan" name="mundipagg.recurrence.plans" template="recurrence/plans/create.phtml" cacheable="false"/>
</referenceContainer>
</body>
</page>