Only if you haven't paid any attention to anything else or do not live in the physical reality we occupy because in this reality, there is quite literally 0% chance that TF3XK engine has been built and getting testing right now.That's exactly how it is!
It is precisely these types of disjointed statements in time, which make you think (hypothesize) that perhaps this engine may not only have been built, but may even be in the testing stages
An engine development process is a marathon, it is neither sprint nor it is a long jump like the one you're doing with your leaps in logic. Pace yourself or you're going to lose it before we reach the finish line.