Why PayPal widget doesn't have "Item ID"

In PayPal widget, I need to pass the "Item Id" so that PayPal can identify the item the user is buying and it can display it on the transactions activity download, currently what jotforms provides is "Product Name" which is an attribute PayPal doesn't consider when we do transaction extract, are there any work around?

They are automatically created once you create a product that's why you don't need to define them. When you check your form source code, you should be able to find a code like the following.

<input class="form-radio validate[required]" type="radio" id="input_14_1001" name="q14_paymentFor[][id]" value="1001">

The value 1001 is the item ID number.

If you want to pass a custom field into the payment gateway, open the payment field properties (Right click the field > Edit Properties) then set a field on the custom field.