Yes, it is correct, but 2 of the ships are still optional. Actual order is only for first two.Akbaba claims Dearsan will build two while Desan and Özata will build one each.
Possibly first two will start construction at Özata and Desan, Dearsan's slipway is occupied with Qatari FAC and MCMW ship.
What I found out recently;
Initially Aselsan signed a $40 million agreement with ASFAT, probably for two ships. Now it is about $50 million per ship.
The increase can only be explained by the inclusion of additional sensor systems, ESM, stabilized turret, sonar, etc. We can see PIRI IRST on the new hulls.