partner-contact/partner_deduplicate_acl/views/base_partner_merge_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2016 Tecnativa - Jairo Llopis
     Copyright 2016 Tecnativa - Vicent Cubells
     Copyright 2017 Tecnativa - Pedro M. Baeza
     Copyright 2019 Tecnativa - Victor M.M. Torres
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html). -->
<odoo>
    <menuitem id='crm_tools' name='Tools'
              parent='crm.crm_menu_root' sequence="24"/>
    <menuitem id='partner_merge_automatic_menu'
              action='base.action_partner_deduplicate'
              groups='group_automatically'
              parent='crm_tools'
    />
</odoo>