Nom…when did i mention Iraqi jews?
The chazon ish is recorded in maaseh ish as saying that it’s a good taanah. He didn’t “agree,” with him in psak.
And to those who learn the sugya of anan sahadi, it fits, but it’s still a chidush. And rav moshe writes in many places that, for instance, yeshivos shouldn’t serve jt, because they are meant to teach ideals and keeping away from things which have even a slight doubt as to their kashrus. He also writes that it’s a bedieved in other places.
His sons held that he said it lechatchila – and kovodom bemolomlm omedes; they are totally entitled to that view, but the other talmidim of rav moshe, including more verabi rav Belsky, did not agree with that.