newsupernova/vendor/magento/module-widget/etc/adminhtml/menu.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Backend:etc/menu.xsd">
    <menu>
        <add id="Magento_Widget::cms_widget_instance" title="Widgets" translate="title" module="Magento_Widget" sortOrder="50" parent="Magento_Backend::content_elements" action="adminhtml/widget_instance" resource="Magento_Widget::widget_instance"/>
    </menu>
</config>