Your guess is as good as mine. But reading between the lines it has something to do with a high end jet fighter engine tech using AI.
@Nilgiri has given his views on it. I concur with what he says.
There are many articles and YouTube news channels that claim that TF35K is in production. One of them is where Mete Yarar, claiming that prototype of a 38000lbf engine for Kaan has been designed and the parts production is progressing. How much credibility he has among defence buffs is another question. But as he is adamantly and openly claiming that Kaan engine is currently in the works, one has to think that there has got to be a “smoking gun” there.
We also know that Kale, RR, TEI. Ivchenko are all working together under a consortium to put together an indigenous engine for Kaan.
I take our officials' words as the most reliable source of information and bet on 2028 as the year when we fly our Kaan with our domestic engine in trials. But I would expect it to happen even earlier as the world is heading towards even more troubled times and we want to be prepared in time for...
defencehub.live
So in spite of all the secrecy and not enough being known about the Kaan engine, with all above leaked information and the clear need of an indigenous engine for our TFX fighter, it is normal that there are patent applications pertaining to KAAN without making it too open. (Remember how we all had got the wind of TF6000, through patent application)