If Turkieye has not yet produced one, then how can we think Pakistan can start and develop an engine ? Maybe one for a cruise missile, but that would be the limit of Pakistan's current scientific/engineering, institutional and infrastructure capabilities would allow.
This depends on how you define "it," that is, what constitutes a domestically produced engine.
1. Directly purchasing it from a foreign country. You have the right to dispose of it.
2. Directly purchasing it from a foreign country, grinding off the foreign logo and printing your own logo.
3. Purchasing all the parts from a foreign country and assembling them domestically.
4. Purchasing most of the components from a foreign country, manufacturing the casing domestically, and completing the final assembly.
5. Importing core components from a foreign country, manufacturing other components domestically, and completing the final assembly.
6. Importing key raw materials from a foreign country, manufacturing all components domestically, and completing the final assembly.
7. Introducing technology from a foreign country and completing everything from raw material production to the final product domestically.
8. Completing everything from design and basic raw materials to the final product entirely domestically.
Currently, China's aero-engine capabilities are at a level of 7-8. This means that we import some technologies from abroad and combine them with our own domestically developed technologies, completing the entire process from the most basic raw materials (natural products) to the final product within China.
What level do you think Türkiye can reach? What level do you think Pakistan can reach?