First, you will develop the system in the shortest time and with the highest possible localization rate.
Then, you will develop the remaining imported subsystems and components in order of importance and integrate them into the system.
And you will never expect everything to be readily available to start developing systems. Perhaps only the USA has this privilege in the world.
SSB President Prof. Ismail DEMIR always says "Perfect is the enemy of the possible".
Utopia: Everything is local, including screws
Perfect: All critical and value-added subsystems and components are local
Possible: Some critical subsystems and components imported
Returning to the T929 (ATAK-2) project, as far as I know, almost everything in this helicopter will be local except the engine. However, TEI General Manager Prof. Mahmut AKSIT also said that they started working on a 3000hp engine 1.5 years ago.