Xfinity App is not Showing my Gateway

The Xfinity gateway does not show in the Xfinity app under devices on the WiFi tab.  I have unplugged the gateway (XB7) for 20 minutes, uninstalled the Xfinity app, power-cycled my iPhone, and re-installed the app.  The only device on my list continues to be the x1 box.  I am unable to manage the gateway.