magento-test/app/code/Magento/Config/Test/Mftf/ActionGroup/AdminExpandConfigSectionActionGroup.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="AdminExpandConfigSectionActionGroup">
        <annotations>
            <description>Expands configuration section passed via argument as Section Name.</description>
        </annotations>
        <arguments>
            <argument name="sectionName" type="string"/>
        </arguments>

        <conditionalClick selector="{{AdminConfigSection.collapsibleSectionByTitle(sectionName)}}" dependentSelector="{{AdminConfigSection.expandedSectionByTitle(sectionName)}}" visible="false" stepKey="expandSection" />
        <waitForElement selector="{{AdminConfigSection.expandedSectionByTitle(sectionName)}}" stepKey="waitOpenedSection"/>
    </actionGroup>
</actionGroups>