You have the option to get your order data and push and show it on your created documents. There are called tags. You can use these tags in the comment, description or title fields of your documents.
Tags:
{{order_number}}
It is the numbering that Shopify generates automatically.
For example 1234
{{order_id}}
It is the ID that Shopify generates automatically. You can add PREFIX and SUFFIX, and between them, there is Order Number. Format: PREFIX + Order Number + SUFFIX
For example: BB1234HELLO
You can edit that within Shopify Admin » Settings » General » Order ID section:
Example:
Let's say you have a Shopify order, with number 565
if you set "Shopify order: {{order_number}}" at your dashboard in Comment field and Save it
Your created document's Comment field will be filled with "Shopify order: 565"