To locally produce something, you need a large requirement to distribute the high upfront cost of the manufacturing line (overhead).
In the best-case scenario, the PAF would order 32 medium-weight transport aircraft. That isn't nearly enough to absorb the production overhead. Rather, Pakistan would do better by joining the production supply chain of an existing aircraft, like the Embraer C390. If the PAF committed to 32 C390s over a period of 12-15 years, I'm sure Embraer would consider the possibility of sending a serious chunk of the production work to Pakistan.
Now, when it comes to helicopters, the best route might be to work with Turkey on the T625 and T629. This is a common platform with the same engine, rotor, and other high-value parts that can result in both a utility helicopter (T625) or attack helicopter (T629).