>>83421571International relations major here. It's not that bad.
The World Bank has a metric for poverty, percentage of the population living on $2.15 or below per day (2017 PPP). Mongolia scores 0.2%, which is the same as Denmark or Norway.
Their own national poverty line metric indicates 27%, which is considerably worse but is about the average for Asia. I would suppose a certain income distribution shape, perhaps social policies that provide safety nets against absolute poverty or adjacent thereof.
Ulaanbaatar is a very cursed city, though. The pollution is real, and there are the yurt ghettos (but unlike Brazil or the US crime statistics aren't particularly higher in the ghettos).
Their geopolitical position is even more cursed in the context of the world economy based on naval trade.
Overall, the material culture of Mongolia is closer to Eastern Europe than to the stans or East Asia. It's as close as you can get to post-Soviet without having actually been a part of the USSR.
As to the lack of vtubers, the whole country has a population of 3.5m. Given vtubing is largely a Japanese and North American phenomenon (which tracks with the fact the global content output is concentrated in only 5 or so countries), even statistically speaking we'd have to expect there to be around 0 to 2 vtubers in the whole of Mongolia.