Is there a report for item sales of non inventory items?
No, there is not. The main purpose of sales invoice items is to help with faster creation of sales invoices (for example, you don’t have to re-enter the same description, account, price, tax code etc.)
I think I will keep it that way. For now, you should just have separate income account created under your
Chart of Accounts for every type of income you want to track. Then
Profit & Loss Statement will show you how much you made per each sales item during specified period.