Timurids have to be the most unlucky major empire/civilization in this series and games like this, enormous importance for world history and they can never get presence because they are either lumped together with Mongols or Mughals or idk Arabia (I'm serious, Bukhara was on Arabia city list at least in civ5)
Like, how do exactly Timurids fill the same niche as Mongols? They are culturally extremely different in all aspects. If you say that Timurids "are too similar to Mongols" then you should throw away all sorts of Scythians, Huns, Khazars, Pechenegs, Cumans, Gokturs, Manchu etc who were all much, much more similar to Mongols (and much harded to differentiate from one another) than Timurid empire. Which had very unique Persian - Turkic cultural blend, was centered in Uzbekistan, was a regular urban - bureaucratic empire and did a ton of science and literature and art. They left far bigger mark on cultural history than for example Cumans who came and disappeared, and their legacy is one Byzantine princess, a bunch of jewelry and a pinch of genes, and their design would be 'average steppe nomads with not much data to infer from'.
Timurids were territorially smaller than Mongols (which isn't surprising because literally everybody else in history was
) but Mongol culture itself left very minimal influence, while Timurid influences can be traced from modern Turkey to Bangladesh. Their sword was smaller, but their pen was bigger (and they
still count as one of the biggest and most powerful military empires in history). You could do Timurids as a conqueror empire under Tamerlane and it would compare fine with other world's greatest conquerors, and you could make them as a cultural civ under Shakh Rukh and it wouldn't look much worse than Italy.
Saying Timurids are almost the same Mughals is also exotic to me, they ruled different areas, in different centuries, under different dynasties, in a different way, with much more different culture (Timurids weren't Indianized at all, Mughals very much). Saying that about Mongols and Timurids or Timurids and Mughals is for me not much different from the same reasoning about Rome and Byzantium. Yeah one was a descendant of another, even dynastic one, but differences were so big in most aspects that we still usually separate them. Also, you could say something similar about Great Britain and USA etc...