INDIA
India needs to produce first AMCA Prototype
also Turbofan Engine development is another issue for India
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SOUTH KOREA
S.Korea is lucky that USA is not blocking sale of GE F-414 engine to S.Korea for KF-21 production
S.Korea needs to develop indigenous turbofan Engine but S.Korea can not do it alone
even most of KF-21 technology from USA , Israel and Europe
-- Engine from American GE
-- AESA Radar technology from Israeli ELTA Systems
-- Terrain-following/terrain avoidance (TF/TA) Systems from Israeli ELTA Systems
-- IRST sensor head unit from Italian LEONARDO
-- CANOPY technology from American TEXSTARS
-- AMADs from American TRIUMP GROUP
-- HELMET from USA
-- Main Generator from American COLLINS AEROSPACE
-- Missile ejection launchers from British COBHAM
-- Ejection Seat from British MARTIN-BAKER
-- Wheel braking system from American MEGGITT
-- Air to Air Missiles from USA and Europe
-- Cruise Missiles from USA and Europe
even simulation link system from Turkish SDT Space and Defense Technologies
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TURKIYE
If we include unmanned stealth Fighter Jets and engine technologies, Turkiye is the leader of the pack
Turkiye has its own systems such as GaN based AESA Radars , EOTS , IRST , DIRCM , EW Suite , Mission computer , HMDS , Targeting and Jamming Pods , and all kinds of Missiles ( cruise , anti-ship , air to air , anti-radiation , ALBM , air to surface )
Among these three countries, Turkiye is most likely to be the first to build a 5th-generation Fighter Jet with its own engine
also MUM-T concept of manned - unmanned teaming for future tactical air combat with KIZILELMA and ANKA-3/4 unmanned stealth Fighter Jets