Good idea
Yes, our Seahawks have that capability since the arrival of first aircraft. In addition, S-70B-28 which is designated as DZKK's Seahawks are more advanced than some other export Seahawks like Greece (HN) somehow specs of the aircraft was demanded different and it's commonly close to LAMPS III which is the US Navy SH-60. All Harpoons in service of DZKK do support target relaying by airborne maritime platforms, F-16, E-7T. Block III was also designed to support that but as I said Block III program was cancelled. Harpoon has a standard range of 70-74 nm at maximum but I assume from the information shares, Atmaca has nearly 1.85-1.90x times more range than Harpoon.
Bro data relay for target assessment/engage is a bit complex thing because its something that has a high dependant on the environment and the tactical scenario. For radar difficulty, we can compare with land based radars just as how airspaces behind mountainous terrain are blindzones. But I don't think this will be much of a big problem for DZKK in future. I can say that it was yesterday's problem. Ada-class corvettes, Barbaros and some Gabya class FFGs or simply all vessels that have 3-D radars (SMART-S Mk2) don't face these difficulties.
Big punch navies and those who will play big in future use TDRS (Tracking and Data Delay Satellite) for the need of data-relay to overcome the horizon limitations when a missile is fired. Can we do it? Yes and we should. Ex:
GSAT-7 of Indian Navy. Actually because of the horizon, few navies operate their own multi-band satellites.
Helicopter supported relay isn't really much preferred today in ASuW of naval warfare. Today's nato type combatant vessels tend to have longer ranged radars (with 3-D search) with sophisticated sensors which heavily relies on C4ISR capabilities. AEW&C aircraft is more preferred as a airborne relay station due to its nature of better data-link components and flying above tens of thousands feets unlike the SH-60.
When a suspected threat is detected, classification and targeting data is provided to the parent ship via the datalink for surface-to-surface munitions engagement. Missile equipped aircraft can conduct independent or coordinated attack, depends upon the threat and tactical scenario.
TF-100, I-class and TF-2000 will have more surface range than the range of Atmaca itself, so no problem but to guarantee the course and guidance, AEW&C support will be welcomed.
Data-relay today in Turkish Navy will be mostly used by smaller combat vessels that can fire anti-ship missiles but have smaller range due to being FAC, missile craft or whatever, if deemed necessary god forbid
Thanks to US during the Cold-war era they did not only modernize the allied navies but also teached, applied and put the capability of being able to conduct combined and joint operations both alliance wide and national wide, as their prime force doctrine, today we still see that. To give an example, the Navy's first ever qualification for every weapon system to be developed is near excellent data-link capabilities, as at the cool video you've shared about Kement.
In my opinion Turkish Navy is likely to put a RfP to procure Naval Aviation Command's very own AEW&C aircraft and satellites hopefully like close to 15-20 years later. Until then, kim öle kim kala