You don't have to buy a new computer to get Wi-Fi 7 speeds. There are external Wi-Fi dongles, such as the Asus RT-BE58 Go or Acer Wave D7, that you can plug into an available USB port to get Wi-Fi 7 ...
Before you proceed with further troubleshooting, check the Xbox Live service status. There is a possibility that there is a problem with the Xbox service. If there is an outage with the Xbox servers, ...