Hi I changed it now to
{##
# Order customer note
#
# @ListChild (list="invoice.base", weight="40")
#}
{% if this.order.getNotes() %}
<div class="customer-note">
<h3>{{ t('Customer note') }}:</h3>
<div>{{ this.order.getNotes()|nl2br }}</div>
</div>
{% endif %}
<div>{{ this.order.profile.membership.name }}</div>
However, still no membership is displayed.