Display fulfillment date in Order Confirmation

We have a custom fulfillment time of 10 business days which is now shown during the select shipping page during check out. Before we updated our theme recently customers were able to see that fulfillment date on their confirmation screen. Now after switching themes this info is no where to be found and i cant seem to find out how to add it back.

What i would like to do now is add their checkout fulfill by date to their Order Confirmation. I have spoken to Shopify and they gave me code to try (post below) however when i made an order from the front end using 100% discount code for product and shipping, my confirmation email did not display the fulfill by date. Does this code looks right or are my
breaking the code somehow? Maybe the code provided is wrong for what i’m looking for. Take a look,

Hi {{ customer.first_name }}, we will be double checking your order accuracy and preparing your package very soon. If you have not uploaded your prescription during ordering we highly suggest you get us a copy ASAP for your free warranty on prescription accuracy.




Our current processing time is 7 - 10 business days + your shipping speeds selected at check out. Save this email as your reminder for the fulfillment estimate given to you at check out.


{% if order.fulfill_by_date %}
Your order is expected to be fulfilled by {{ order.fulfill_by_date | date: ‘%B %d, %Y’ }}.
{% endif %}

You will be impressed by your new vision. These are worth the wait!- according to many.

I didn’t see that as an available variable (https://help.shopify.com/en/manual/fulfillment/setup/notifications/email-variables), maybe they were just showing a pseudo example.

I did see fulfillment.estimated_delivery_at, maybe you can use that.