odoo16/addons/website_event_sale/views/website_event_templates.xml

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

<template id="registration_template" inherit_id="website_event.registration_template">
    <!-- Add price information on tickets (multi tickets, aka in collapse) -->
    <xpath expr="//div[hasclass('o_wevent_registration_multi_select')]" position="inside">
        <t t-if="ticket.price">
            <t t-if="(ticket.price - ticket.price_reduce) &gt; 1 and website.pricelist_id.discount_policy == 'without_discount'">
                <del class="text-danger me-1" t-field="ticket.price" t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"/>
            </t>
            <span t-field="ticket.price_reduce"
                  t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"
                  groups="account.group_show_line_subtotals_tax_excluded"/>
            <span t-field="ticket.price_reduce_taxinc"
                  t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"
                  groups="account.group_show_line_subtotals_tax_included"/>
            <span itemprop="price" class="d-none" t-out="ticket.price"/>
            <span itemprop="priceCurrency" class="d-none" t-out="website.pricelist_id.currency_id.name"/>
        </t>
        <span t-else="" class="fw-bold text-uppercase">Free</span>
    </xpath>
    <xpath expr="//div[hasclass('o_wevent_price_range')]" position="inside">
        <t t-if="event.event_ticket_ids[-1].price_reduce > 0">
            <span class="text-dark">
                From
                <span t-out="event.event_ticket_ids[0].price_reduce" t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"/>
                <t t-if="event.event_ticket_ids[-1].price_reduce != event.event_ticket_ids[0].price_reduce">
                    to
                    <span t-out="event.event_ticket_ids[-1].price_reduce" t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"/>
                </t>
            </span>
        </t>
    </xpath>
    <!-- Add price information on tickets (mono ticket, aka not in collapse) -->
    <xpath expr="//div[hasclass('o_wevent_registration_single')]//h6" position="after">
        <div class="px-2 text-dark d-flex align-items-center align-self-stretch">
            <t t-if="tickets.price">
                <t t-if="(tickets.price - tickets.price_reduce) &gt;1 and website.get_current_pricelist().discount_policy == 'without_discount'">
                    <del class="text-danger me-1" t-field="tickets.price" t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"/>
                </t>
                <span t-field="tickets.price_reduce"
                      t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"
                      groups="account.group_show_line_subtotals_tax_excluded"/>
                <span t-field="tickets.price_reduce_taxinc"
                      t-options="{'widget': 'monetary', 'from_currency': event.company_id.sudo().currency_id, 'display_currency': website.pricelist_id.currency_id}"
                      groups="account.group_show_line_subtotals_tax_included"/>
                <span itemprop="price" class="d-none" t-out="tickets.price"/>
                <span itemprop="priceCurrency" class="d-none" t-out="website.pricelist_id.currency_id.name"/>
            </t>
            <span t-else="" class="fw-bold text-uppercase">Free</span>
        </div>
    </xpath>
</template>

</odoo>