magento-test/app/code/Magento/Ui/Test/Mftf/ActionGroup/AdminGridColumnShowActionGroup.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="AdminGridColumnShowActionGroup">
        <annotations>
            <description>
                Shows new column on Admin Grid page.
            </description>
        </annotations>
        <arguments>
            <argument name="columnLabel" type="string"/>
        </arguments>

        <click selector="{{AdminDataGridHeaderSection.columnsToggle}}" stepKey="openColumnsTab"/>
        <checkOption selector="{{AdminDataGridHeaderSection.columnCheckbox(columnLabel)}}" stepKey="showNewColumn"/>
        <click selector="{{AdminDataGridHeaderSection.columnsToggle}}" stepKey="closeColumnsTab"/>
        <seeElement selector="{{AdminDataGridTableSection.columnHeader(columnLabel)}}" stepKey="seeNewColumnInGrid"/>
    </actionGroup>
</actionGroups>