my adminhtmlsystem.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
<system>
<tab id="General" translate="label" sortOrder="10">
<label>Mageplaza</label>
</tab>
<section id="meetanshi" translate="label" sortOrder="130" showInDefault="1"
showInWebsite="1" showInStore="1">
<class>separator-top</class>
<label>Hello World</label>
<tab>meetanshi</tab>
<resource>Meetanshi_Extension::config</resource>
<label>General Configuration</label>
<group id="system" translate="label" type="text" sortOrder="1" showInDefault="1"
showInWebsite="1" showInStore="1">
<field id="config1" translate="label" type="text" sortOrder="1"
showInDefault="1" showInWebsite="1" showInStore="1">
<label>Module Enable</label>
<source_model>MagentoConfigModelConfigSourceYesno</source_model>
</field>
<field id="display_text" translate="label" type="text" sortOrder="1"
showInDefault="1" showInWebsite="0" showInStore="0">
<label>Display Text</label>
<comment>This text will display on the frontend.</comment>
</field>
</group>
</section>
</system>
my etcacl.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:Acl/etc/acl.xsd">
<acl>
<resources>
<resource id="Magento_Backend::admin">
<resource id="Meetanshi_Extension::extension" title="Hello World"
sortOrder="51">
<resource id="Meetanshi_Extension::post" title="Posts" sortOrder="10"/>
<resource id="Meetanshi_Extension::configuration" title="Configuration"
sortOrder="99" />
</resource>
<resource id="Magento_Backend::stores">
<resource id="Magento_Backend::stores_settings">
<resource id="Magento_Config::config">
<resource id="Meetanshi_Extension::config" title="System
Configuration"/>
</resource>
</resource>
</resource>
</resource>
</resources>
</acl>
</config>
adminhtmlmenu.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Backend:etc/menu.xsd">
<menu>
<add id="Meetanshi_Extension::extension"
title="admin panel"
module="Meetanshi_Extension"
sortOrder="51"
resource="Meetanshi_Extension::extension"
/>
<add id="Meetanshi_Extension::post"
title="Manage Posts"
module="Meetanshi_Extension"
sortOrder="10"
action="extension/post"
resource="Meetanshi_Extension::extension"
parent="Meetanshi_Extension::extension"
/>
<add id="Meetanshi_Extension::extension_configuration"
title="Configuration"
module="Meetanshi_Extension"
sortOrder="99"
parent="Meetanshi_Extension::extension"
action="adminhtml/system_config/edit/section/extension"
resource="Meetanshi_Extension::extension_configuration"
/>
</menu>
</config>
etcconfig.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation
="urn:magento:module:Magento_Store:etc/con
fig.xsd">
<default>
<helloworld>
<general>
<enable>1</enable>
<display_text>Hello World</display_text>
</general>
</helloworld>
</default>
</config>