As far as I can recall, this current KAAN will probably make another flight before the end of the year. The second prototype is being built. It should be ready to fly early next year with all the necessary alterations made with the information and data gathered from the initial flights of the current prototype.
According to media reports:
Turkish Aerospace Industries (TAI) is nearing completion of the second prototype of its fifth-generation fighter jet, KAAN, which it is developing to commence flight testing.
According to Avionot.com, assembly of the second KAAN prototype and engine integration are expected to be finalized in June and July.
Subsequently, this prototype will begin comprehensive flight tests followed by the other KAAN prototypes.
According to TAI, there will be 14 prototypes of KAAN. Last two that will be built in 2028, will have indigenous engines powering them.
So there will be 11 more prototypes from which TAI will receive data to build the serial production units of block 10.