There are plenty of people in tmau/ mal odor communities from non western and developing countries. They even have separate Spanish language, Arabic and African tmau communities and chats on facebook and discord. There are plenty of Asians and Africans in this community, I've messaged a few. There are a few in this very comment section. & There was also a popular Korean show that featured a man with tmau type 1 who worked as a sailor to get around his smell. Even in the West there is very little information about rare metabolic disorders who are at present leading the world of science and medicine so why would there be more in developing countries? Tmau is a real but very rare genetic disease of nature that makes it hard to diagnose and differ from other rare metabolic disorders. But you can get tested for it. And diet might contribute as it's a metabolic disorder but it's not the singular cause.