1. The 5th-Gen fighter jet itself has some electronic warfare capabilities, but they are primarily for self-defense. It is not suitable for conversion into a dedicated electronic warfare fighter.
Once electronic warfare is activated, it effectively tells the enemy, "I'm coming." ------ The enemy's radar system is disrupted. It may not know your exact location, but it will definitely know you're coming. This contradicts the concept of stealth warfare.
2. Given the PAF's current situation, I personally believe it doesn't need a dedicated electronic warfare fighter. The IAF's systems are too outdated and disorganized. The PAF only needs a limited electronic warfare self-defense capability.
The IAF's Rafale fighters rely on pilots to visually observe their wingmen and communicate with headquarters via intercoms. Using dedicated electronic warfare fighters to deal with such an opponent would be a waste.