Actually a stealth aircraft with strong EW is desirable. You can sneak in close enough without being detected, and then out of sudden the enemy's aircraft sansors all become useless when the your EW gear is switched on. WIth their sensor become useless they cannot detect you.
The next event would be your comrades' task to launch AAM attack to destroy these blinded enemy.
To avoid radar reflection from the EW pods, they can be stored in the internal weapon bay, and extended downward before they are activated. You would need to redesign the mechanism (like an extension arm for PL-10) inside the IWB to extend and retract the EW pod, and also a new EW pod design.
The question is can they design an EW pod to be fitted inside the IWB? J16D can carry up to 4 or 5 EW pods, J20 probably would carry less pods inside the IWB thus may not be as powerful in EW power as in J16D.