I don’t think it’s necessary, as long as you can use datalink to guide the seeker to find the target.
and I think the microwave version AKD-10 is not BA-21, it seems BA-21 is larger than BA-7(exported akd-10).
edit: it has a small pod, but not sure if it’s radar pod, microwave irradiation pod, or just a special datalink pod(this not quite possible). time changed, Chinese do have many strong micro radar, so it’s hard to judge.