That's being too optimistic. Just like the Indians claiming they will have their AMCA fifth generation fighter ready by that time frame as well. I don't believe that, and the Indians even have better experience, since at least they have barely managed to designed and built a semi 4th generation fighter jet(and that again with lots of western/Israeli help/input) and that's after several decades of painful work and trials.
If building airframes/parts and assembly of fighter jets was the barometer to build a credible fighter jet, then several countries around the world will be doing that long ago today. lol It seems to me that some of you guys underestimate the difficulties/complexity of building such an advanced complex fighter, it is not a child's play, especially for a new entrant/country who has no prior experience doing so before, that's without even counting the cost(why you think we are brought in Italy/Sweden and are open to more countries joining our tempest program?). The hell even an advanced experienced industrial power like Russia has been struggling with the development of it's SU-57 fifth generation fighter.
India is a bad example as it is a poor 3rd world country with almost no advanced industrial base.
Turkey is far higher up the technological base - Turkey exports around 2-3 billion US dollars a year in defence products compared to less than 1 billion US dollars for India.
I think there are two main areas that Turkey needs outside help in if it wants to succeed on TF-X:
1. Engines - it probably won't even have a half-decent 4th gen engine ready by the early 2030s, let alone a 5th gen one.
2. Systems integration - it needs to pick a partner like BAe or Saab to provide the expertise for it.
Turkey does have an advantage in that if it can get a half-decent fighter in production then it will likely get orders from Muslim countries like Pakistan, BD and some others like Azerbaijan and maybe Qatar. Remember Pakistan ordered 30- T-129 attack helicopters from Turkey but the US vetoed its sale due to US engine. The Turks are now trying to get their own engine ready by mid-decade.
As for Russia, I think the SU-57s woes are more due to Russia trying to build a 5th gen fighter on the cheap rather than any lack of industrial capability - although their inability to even get their first AESA radar on one of their 4th gen fighters suggest that they are falling behind the rest in fighter radar technology.