Not sure, according to WindowsCenteral:
No Bluetooth for Xbox Series X
The Xbox Series X won't have Bluetooth, similarly to the Xbox One, Xbox One S, and Xbox One X. The reason is simple; the Bluetooth signal isn't strong enough to meet Microsoft's specifications for latency. Microsoft uses its proprietary signal, dubbed Xbox Wireless, for connecting controllers and other accessories, like the Turtle Beach Stealth 600 and the SteelSeries 9X wireless headsets.
Bluetooth technology is becoming near-universal, but it is not a feature on the Xbox Series X. While the system itself won't support Bluetooth, the controllers will at least.
www.windowscentral.com
.
More proprietary shit.