Without having tested the L-UMTAS missile from AUSV ULAQ? I am personally very impressed by this thing. Unless they fired the missile but in secret without disclosure. Turkey usually makes public its successes in defense technology.
Usually weapon systems receive mass production approval when they receive the relevant certifications after a long period of testing and firing. Weapon upgrade kits are a common practice for sure but with some tens to hundreds of hours of testing and dozens of shots. With one shot of the Cirit missile and two test voyages they came to such quick conclusions? It seems to me a very easy conclusion to be realistic. Weapons systems need maturation time like an old red wine. Rushing out a weapon system in mass production seems to me at least superficial. Unless the Turkish defense industry makes 10 pieces in the form of prototypes of different versions to be tested in real conditions. But this is a completely different thing from "mass production".
The platform has been constantly on tests since it was launched, there has been several tests in the factory, some at the harbor (actually plenty) and it has done more than just 2 cruises even if i i can count correctly at least 3 or 4 cruises were released to media. It did some long cruises, fired cirit with and without warhead and i think eventually fired Umtas or going to fire it soon without/then with a live warhead as well.
They are moving forward with the base configuration as shore-protection platform, and companion for frigates/corvettes/OPVs. It will be the first one to be serially produced and commissioned to share load of FIBs initially.
In my opinion it will be followed with shore-based ISR variant too in addition to ASW variant which is disclosed officially. We can expect ship launched ISR-ASW variants after those.
Lastly, the unmanned part of the systems has been going through some tests even before the platform has emerged.
Is it matured? I think sufficiently, nothing is matured enough until it is being tested by some crazy military guy. So they have initially decided to move onto serial production with the sufficiently proven platform.