newsupernova/app/code/WeltPixel/Backend/etc/adminhtml/menu.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © 2015 Magento. 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="WeltPixel_Backend::WeltPixel" title="WeltPixel" module="WeltPixel_Backend" sortOrder="200" resource="WeltPixel_Backend::WeltPixel"/>
    </menu>
</config>