People usually underestimate Turkish efforts simply because they're relatively new contenders among modern fighter aircraft developers, but there's an incredible amount of painstaking work underway within their MIC, building upon a far from insignificant foundation of experience and capability.
As a self-proclaimed realist and a long-time military aviation and Turkish MIC observer, I can say with confidence that Baykar's Kizilelma fighter drone alone, which is being developed iteratively, already has enough RCS treatment to be a highly competitive LO contender among existing stealth fighter designs (say, the Su-57, for example!). It already comes equipped with an F-16-grade GaN radar, IRST and EOTS, a sizable IWB, conformal antennas all-around, and an integrated EW suite (although the nose cannot accommodate both the radar and IRST simultaneously - it's either radar + EOTS or IRST + EOTS).
--Admittedly, the panel-gap tolerances on the Kizilelma prototypes could be a bit better, but they're still only producing the initial LRIP aircraft.--
OTOH, Kaan's P1 (which is a far more serious product than any other Turkish stealth aircraft) incorporates every treatment found on the F-35, F-22, J-20/35, etc. that makes them S-tier 5th-generation LO platforms (minus the application of RAM, for now).
On the optical sensor side, Kaan actually has a very strong chance of being simply better equipped than these aircraft (LWIR IRST + MWIR EOTS + DAS) when it enters service. While the J-20A is highly likely to already field a GaN-on-SiC radar, Kaan is, aside from the J-20A, actually further along with its GaN radar than the F-35 Block 4, for crying out loud...
If anyone needs proof, I recommend checking out the respective threads for these aircraft on a certain other popular military aviation forum