After running the latest Windows update, my two laptops, xbox controllers stopped getting listed under Microsoft account/devices.I tried all the usual methods including a factory reset, but it still does not work. Under Microsoft Store device management, there is a blank entry and it does not let me unlink it.
It looks like that the link between device and Microsoft account is corrupted or there is a sync issue. I contacted Microsoft support but they are not sure why and asked me to wait 30 days to see if the device list will refresh automatically.