We have the words of CEO Phil Spencer which said during an interview that the Xbox Series consoles have outsold and are outpacing all previous consoles.
Taken from DF @ Xbox Series X/S is Microsoft's fastest-selling Xbox console generation, despite supply constraints | Eurogamer.net
But Spencer went on to say that Xbox Series X/S had achieved this fastest-selling feat despite the much-reported supply shortages hitting chip manufacturers, production delays due to the Covid, and various global distribution bottlenecks.