How can I add Delivery Method, Fulfilment Date, and Location to my picking slip fields?

I would like to add the Delivery Method, Fulfilment Date, and Location for each order item on my picking slip, but can not find the fields to include in the standard documentation.

I have found the delivery method with some Googling…

Delivery Method: {{ order.shipping_method.title }}

Can anyone give me some pointers for the other two fields - and or whether they can are not available in the standard picking slip code we can update in settings.

Many thanks

Nick