The number is supposed to be 854k in the US according to this article : https://www.theverge.com/2021/11/12/22776640/nintendo-switch-oled-sales-october-2021-doug-bowser-interview
Outside of hardware, Nintendo noted that Metroid Dread — which launched alongside the OLED Switch on October 8th — sold 854,000 units in the US, making it “the best start for any Metroid game ever,” according to Bowser. Meanwhile, Animal Crossing: New Horizons received “a significant spike in people buying the game” after its final major update, according to Nintendo, though the company hasn’t released specific numbers on this. New Horizons is currently the second best-selling Switch game with nearly 35 million units sold globally.
So in just over three weeks, in a single country, and not including digital, it's sold nearly a third of the current highest selling Metroid game's total.
Globally and overall, it's probably well over half of Prime by the end of last month. I think it's safe to say at this point that the ceiling for Metroid sales is going to be shattered.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.