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No, native Nepalese are East Asians as are Tibetans. The Janajatis are the native East Asians to Nepal. The minority now at 30%.
The problem they've had is Indian immigration into Nepal over the last 20, 30, 40 - 60+ years, who are the majority now, the Khas at 40%. They are South Asians who are descents of Indians who have immigrated into Nepal. They own most of the taxis, newsagents, shops and takeaways now in Nepal. There's also a population of 700,000 Indian citizens on top of that.