Portal

<data inherit_id="portal.portal_my_details_fields" priority="50">
    <xpath expr="//input[@name='name']/.." position="replace">
        <div t-attf-class="mb-3 #{error.get('firstname') and 'o_has_error' or ''} col-xl-6">
            <label class="col-form-label" for="firstname">Firstname</label>
            <input type="text" name="firstname" t-attf-class="form-control #{error.get('firstname') and 'is-invalid' or ''}" t-att-value="firstname or partner.firstname"/>
        </div>
        <div t-attf-class="mb-3 #{error.get('lastname') and 'o_has_error' or ''} col-xl-6">
            <label class="col-form-label" for="lastname">Lastname</label>
            <input type="text" name="lastname" t-attf-class="form-control #{error.get('lastname') and 'is-invalid' or ''}" t-att-value="lastname or partner.lastname"/>
        </div>
    </xpath>
</data>

<data inherit_id="portal.portal_my_details_fields" priority="50">
    <xpath expr="//input[@name='street']/.." position="after">
        <div t-attf-class="mb-3 #{error.get('street') and 'o_has_error' or ''} col-xl-6">
            <label class="col-form-label" for="street2">Street2</label>
            <input type="text" name="street2" t-attf-class="form-control #{error.get('street2') and 'is-invalid' or ''}" t-att-value="street2 or partner.street2"/>
        </div>
    </xpath>
</data>