odoo16/addons/mail/wizard/mail_wizard_invite_views.xml

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

        <!-- wizard view -->
        <record model="ir.ui.view" id="mail_wizard_invite_form">
            <field name="name">Add Followers</field>
            <field name="model">mail.wizard.invite</field>
            <field name="arch" type="xml">
                <form string="Add Followers">
                    <group>
                        <field name="res_model" invisible="1"/>
                        <field name="res_id" invisible="1"/>
                        <field name="partner_ids" widget="many2many_tags_email"
                                placeholder="Add contacts to notify..."
                                context="{'force_email':True, 'show_email':True}"/>
                        <field name="send_mail"/>
                        <field name="message" attrs="{'invisible': [('send_mail','!=',True)]}" options="{'style-inline': true, 'no-attachment': true}" class="test_message"/>
                    </group>
                    <footer>
                        <button string="Add Followers"
                            name="add_followers" type="object" class="btn-primary" data-hotkey="q"/>
                        <button string="Cancel" class="btn-secondary" special="cancel" data-hotkey="z" />
                    </footer>
                </form>
            </field>
        </record>

    </data>
</odoo>