API Limitations

Hi all!

My organization uses a platform called Ramp to make credit card purchases, which integrates with QuickBooks Online. When our expenses from Ramp sync to QBO the details that map between Ramp and QBO map to the "Category details" section in QBO opposed to the "Item details" section in QBO. When we try to create an invoice (i.e. pledge) for that expense, the "Category details" do not pre-populate the fields on the invoice like the "Item details" would. If we try to enter in the product/service on the invoice the rest of the information is wiped out (like the amount for instance). We have discussed this issue with Ramp and they believe it is a limitation with the QBO API that the mapped fields can only flow to the "Category details" opposed to the "Item details". I am not personally familiar with the QBO API, but is there someone that confirm that this is a limitation that exists. Thanks!