odoo16/addons/auth_totp_mail/data/mail_template_data.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
<data noupdate="1">
    <record id="mail_template_totp_invite" model="mail.template">
        <field name="name">Settings: 2Fa Invitation</field>
        <field name="model_id" ref="base.model_res_users" />
        <field name="email_from">{{ (object.company_id.email_formatted or user.email_formatted) }}</field>
        <field name="subject">Invitation to activate two-factor authentication on your Odoo account</field>
        <field name="partner_to">{{ object.partner_id.id }}</field>
        <field name="lang">{{ object.partner_id.lang }}</field>
        <field name="auto_delete" eval="True"/>
        <field name="body_html" type="html">
<div style="margin: 0px; padding: 0px; font-size: 13px;">
    <p style="margin: 0px; padding: 0px; font-size: 13px;">
        Dear <t t-out="object.partner_id.name or ''"></t><br/><br/>
        <t t-out="user.name  or ''"></t> requested you activate two-factor authentication to protect your account.<br/><br/>
        Two-factor Authentication ("2FA") is a system of double authentication.
        The first one is done with your password and the second one with a code you get from a dedicated mobile app.
        Popular ones include Authy, Google Authenticator or the Microsoft Authenticator.

        <p style="margin: 16px 0px 16px 0px; text-align: center;">
            <a t-att-href="object.get_totp_invite_url()"
                style="background-color:#875A7B; padding: 8px 16px 8px 16px; text-decoration: none; color: #fff; border-radius: 5px;">
                Activate my two-factor Authentication
            </a>
        </p>
    </p>
</div>
        </field>
    </record>
</data>
</odoo>