To display cart attributes on the order status page you need to install this code snippet in your store Admin.
Step 1: From your Shopify admin, click Settings, and then click Checkout.
Step 2: In the Order processing section, find the Additional scripts text box:
Step 3: Paste this code snippet then Save
<script>
Shopify.Checkout.OrderStatus.addContentBox(
'<h2>Cart Attributes</h2>',
'<div class="section__content">
{%- for checkout in checkout.attributes -%}
{%- assign code = checkout[0] -%}
{%- assign name = shop.metafields.customer_attribute[code] -%}
{%- if name -%}
<h3>{{- name -}}</h3>
{%- else -%}
<h3>{{- code -}}</h3>
{%- endif -%}
{%- if checkout[1] contains "[" -%}
{%- assign values = checkout[1] | remove: "[" | remove: "]" | split: ", " -%}
<p style="margin-bottom: 15px;">{%- for value in values-%}
{{- value | remove: """ -}} ,
{%- endfor -%}</p>
{%- else -%}
<p style="margin-bottom: 15px;">{{- checkout[1] -}}</p>
{%- endif -%}
{%- endfor -%}
</div>'
)
</script>
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