whatsapp_web_groups/hr_efficiency/views/planning_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <!-- Add Efficiency menu to Planning Reporting -->
                            <menuitem id="planning_menu_efficiency"
                              name="Efficiency"
                              parent="planning.planning_menu_reporting"
                              action="hr_efficiency.action_hr_efficiency"
                              sequence="20"
                              groups="planning.group_planning_user"/>
    </data>
</odoo>