Ah, in that case, you have 2 ways to do this

  1. Create another data type called Cart, which has a list of Items Cart in it as a list (you’ll need Items Cart since it specifies the quantity and the Item); or
  2. Create the Order whenever a user add a Item Cart and add a Status field for it. Filter by Status (the fields can be In cart, Pending payment, Completed and so on)

Let me know if this works