magento-test/app/code/Magento/Config/Test/Mftf/ActionGroup/AdminExpandConfigTabActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="AdminExpandConfigTabActionGroup">
        <annotations>
            <description>Goes to the 'Configuration' page and expands main level configuration tab passed via argument as Tab Name.</description>
        </annotations>
        <arguments>
            <argument name="tabName" type="string"/>
        </arguments>

        <scrollTo stepKey="scrollToTab" selector="{{AdminConfigSection.collapsibleTabByTitle(tabName)}}" x="0" y="-80"/>
        <conditionalClick selector="{{AdminConfigSection.collapsibleTabByTitle(tabName)}}" dependentSelector="{{AdminConfigSection.expandedTabByTitle(tabName)}}" visible="false" stepKey="expandTab" />
        <waitForElement selector="{{AdminConfigSection.expandedTabByTitle(tabName)}}" stepKey="waitOpenedTab" />
    </actionGroup>
</actionGroups>