Do we talk about the same kind of TVC like F-22 has, with the markaging „stealthy“ design?
I doubt it. Not same kind. But similar may be.
TVC applied to the EJ200 engine by ITP Aero was 3D form. F22 has a 2D form TVC made from all the exotic materials you can think about.
The F119-PW-100 engine for the F-22 Raptor, which includes its unique two-dimensional pitch thrust-vectoring nozzle (TVC), was produced in bulk at a unit cost of approximately
$10million in 2006. (16.5million dollars with today’s money)
Most importantly, well over 200 million dollars was spent to produce just one demonstrator engine in 1983. (That is nearly 900million dollar of today’s money) that is not inclusive of development cost of the engine from scratch.
TVC can be a way to give extra agility to a jet fighter. But it is not a necessity. If the plane and especially it’s airframe is designed accordingly, it may not need TVC at all. So KAAN may not need it.
Using the agility capability of a plane means fighting close quarters and consequently losing speed and energy each time TVC is is activated. This would negatively affect the operational radius of the fighter. A plane like KAAN with its stealth and sensor fusion would prefer to fight from a distance.