flectra/addons/event_sale/report/event_event_templates.xml

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

    <template id="event_registration_report_template_badge" inherit_id="event.event_registration_report_template_badge">
        <xpath expr="//div[@id='o_event_name']" position="inside">
            <div t-if="o.event_ticket_id" class="col-xs-12 text-center" style="padding:0px;">
                <div style="background: lightgrey; height: 65px;" class="mt16 text-center">
                    <h3><span t-field="o.event_ticket_id"/></h3>
                </div>
            </div>
        </xpath>
    </template>

    <template id="event_event_report_template_badge" inherit_id="event.event_event_report_template_badge">
        <xpath expr="//div[@id='o_event_attendee_name']" position="inside">
            <div t-if="bool(len(event.event_ticket_ids))" class="col-xs-12" style="padding: 0px;" t-ignore="true">
                <div style="background: lightgrey; height: 65px;" class="mt16 text-center">
                    <h3>Ticket Type</h3>
                </div>
            </div>
        </xpath>
    </template>

</flectra>