I have not read any mention of it in the reports or traditions, there may be, but I just haven’t seen. Regardless, just because someone is from Iraq or Iran does not make them of higher status than someone from Pakistan or Afghanistan, just like being Sayyid doesn’t automatically make you higher than non-Sayyid. The Quran attests that the best ones are those with piety. Moreover, just look at the mothers of our Imams, several of them were not Arabs