You are right I didn't read the whole article, I just skimmed through it cause I read it before i forgot most of it but i was certain Africa invented iron metallurgy, my mistake. But it seems you also didn't read the whole article because if you read the whole article you know that I am right.
Archaeometallurgical scientific knowledge and technological development originated in numerous centers of Africa; the centers of origin were located in West Africa, Central Africa, and East Africa; consequently, as these origin centers are located within inner Africa, these archaeometallurgical developments are thus native African technologies. Iron metallurgical development occurred 2631 BCE – 2458 BCE at Lejja, in Nigeria, 2136 BCE – 1921 BCE at Obui, in Central Africa Republic, 1895 BCE – 1370 BCE at Tchire Ouma 147, in Niger, and 1297 BCE – 1051 BCE at Dekpassanware, in Togo.
In 2014, archaeo-metallurgist Manfred Eggert argued that, though still inconclusive, the evidence overall suggests an independent invention of iron metallurgy in sub-Saharan Africa. In a 2018 study, archaeologist Augustin Holl also argues that an independent invention is most likely.
@DarkStarDown that article says that iron metallurgy developed in near east in Second Millennium BC, which is later than it was developed in Africa.
Overall and latest evidence suggests that iron metallurgy was developed before anyone else in Sub Saharan Africa and independently.