Wix invoices, automation and item number

Question:
Wix Invoice Automation Invoice is sent does not send the number of items ?

Product:
Wix Invoices

What are you trying to achieve:
I want to send the invoices to our tax system but for this i need the number of items of an invoice

What have you already tried:
I exported the csv in Wix Studio and look up on my databse based on order id and then i will take the needed details about the items

Additional information:
Please ask me if something is missing? I am really new here!