system.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_Config:etc/system_file.xsd">
    <system>
        <section id="rss" translate="label" type="text" sortOrder="80" showInDefault="1" showInWebsite="1" showInStore="1">
            <label>RSS Feeds</label>
            <tab>catalog</tab>
            <resource>Magento_Rss::rss</resource>
            <group id="config" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Rss Config</label>
                <field id="active" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                    <label>Enable RSS</label>
                    <source_model>Magento\Config\Model\Config\Source\Enabledisable</source_model>
                    <backend_model>Magento\Rss\Model\System\Config\Backend\Links</backend_model>
                </field>
            </group>
        </section>
    </system>
</config>