XFi and Modem Does not see IP for Wifi Device

I have a Dell Desktop with a Wifi built in.  I don't see this device in XFi app or on the router list of IPs.  I've checked every active IP and do not see this device.

I have internet access and can see other devices on the network.  I can ping the IP from another machine so I know the device is active.  I see the device when on IP scanning tool (Advance IP Scan).

How do I add this device to I can disable in Xfi app?  I have MAC address, can I manually add mac address to manage the device in Xfi app?

The manufacturer of the wifi device is Hon Hai Precision Ind.Co. LT.