KAAN is projected to go into the serial production in about 4 years.
Of course with the help of European defense companies, KAAN wouldn't have any problems with the engines, testing of the systems, weapons and avionics. Besides it could be a lot cheaper.
Of course, the most logical thing for Europeans would to get, let's say just 150 to 200 aircrafts till European next generation of planes fly. Moreover, they can use it as experience and have Turkiye cooperate in the future projects
Years saved and probably 20bn.
I am not holding my breath , though.