Need to change a channel in the "Private Wi-Fi Network Configuration (2.4 GHz)" located in Gateway > Connection > Wi-Fi > Edit 2.4 GHz

Inside the Gateway > Connection > Wi-Fi > Edit 2.4 GHz, the configuration is grayed out on my gateway, 

Its my admin tool, why can I see the configuration, but its grayed out?(I cant select anything, cant interact with checkboxes)

I followed this guide to see if I am able to change the channel, https://www.xfinity.com/support/articles/change-wifi-mode-admin-tool-xfinity-xfi

The guide does say that for my Model XB7 there should be no option to edit the settings via the app, but than what am i supposed to do?

Using the XFinity App, I only have the option to split into 2.4 and 5 GHz, there is no option to select a channel. And there also no options to edit the whole configuration that I see on my Gateway, I want to be able to have a whole access to my own gateway.

Is there anyway for me to gain ability to edit a channel on my device? Its Xb7-t Carrier Comcast Modem + Wifi Wireless Router Modem