odex25_standard/odex25_donation/droggol_theme_common/data/groups.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record id="base.group_user" model="res.groups">
        <field name="implied_ids" eval="[(4, ref('product.group_product_variant'))]"/>
    </record>

</odoo>