TAI knows best if the engineers are overworking or not or if the aircraft is fit to conduct its first flight. I doubt any SSB bureaucrats have any detailed data about the airworthiness of Kaan.
Yes TAI knows that. They say they are overworking and they are proud of it. That is not a question.
Question is how long can they sustain this or is it sustainable? It usually isn't. We are not talking about just couple of years.