I saw that update 2.9 is coming in the most detailed report. You will be able to use this report to bill the stores. In our case, we are only using COD as a form of payment, that is, we do not control transactions.
Not sure where you saw the reports are coming in 2.9.0.
Kindly follow the "DONE" section of the roadmap. https://trello.com/b/bHoOPv3r/foodomaa-roadmap