Why is the fulfillment.created_at variable not showing on my invoice?

I need to add the fulfillment date to the invoices created with order printer. The variable “fulfillment.created_at” is giving me no output and is missing in the dev log!? Please help me :slightly_smiling_face:

https://shopify.dev/docs/themes/liquid/reference/objects/fulfillment#fulfillment-created_at

NOT On this page

Anybody has a work around? I get no output for {{ fulfillment.date }} or {{ fulfillment.created_at}} and this is all I can find :disappointed_face: