https://www.gamespot.com/articles/gamestop-nearly-sells-through-its-xbox-one-x-suppl/1100-6454790/

Retailer GameStop sold nearly all of its Xbox One X stock on launch day, November 7, the store has announced, according to The Wall Street Journal. As WSJ mentions, GameStop did not say how many units its sold, which is a critical detail.

Retailers don't want to be stuck with excess stock, so it's possible GameStop requested a conservative number of units, though we don't know for sure. Not having units to sell puts GameStop in an unfortunate situation in the short-term, but the company will surely receive more shipments. And in the meantime, it creates the feeling of scarcity, which could in turn create more interest in the new console.