I cannot see the 2.4 and 5 GHz WiFi settings in Advanced Settings

I cannot see the 2.4 and 5 GHz WiFi settings in Advanced Settings. I tried logging in to the local admin tool at 10.0.0.1 and going to "Connection" - "WiFi" - "Edit 2.4 ghz WiFi", but cannot change the setting. The page gave me this message: 

Wi-Fi Mode, Security Mode, Channel Selection, Channel Mode, and Channel Bandwidth are being managed automatically to help optimize your home Wi-Fi network and improve Wi-Fi coverage. To edit your Wi-Fi Network Name & Network password, please download the Xfinity xFi app or visit xfinity.com/myxfi.

Thanks for your help.

yc