newsupernova/vendor/magento/module-customer/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_Customer::customer" title="Customers" translate="title" module="Magento_Customer" sortOrder="30" resource="Magento_Customer::customer"/>
        <add id="Magento_Customer::customer_manage" title="All Customers" translate="title" module="Magento_Customer" sortOrder="10" parent="Magento_Customer::customer" action="customer/index/" resource="Magento_Customer::manage"/>
        <add id="Magento_Customer::customer_online" title="Now Online" translate="title" module="Magento_Customer" sortOrder="30" parent="Magento_Customer::customer" action="customer/online/" resource="Magento_Customer::online"/>
        <add id="Magento_Customer::customer_group" title="Customer Groups" translate="title" module="Magento_Customer" sortOrder="50" parent="Magento_Customer::customer" action="customer/group" resource="Magento_Customer::group"/>
    </menu>
</config>