2.4 GHz only

Is the below true?  I am very disatisfied if so.  I need a 2.4 GHz network and pay Xfinity for the device that is supposed to be "the best" for xfinity customers.  I have 2 devices that will not connect to your gateway and the commonality is that they require 2.4 GHz connections.  They are my garage door opener and my sprinkler system.  I will need to get my own device if this isn't something you'll allow us to have with that device.

Please contact me if I'm misunderstanding.  The AI that manages incoming chats was not useful.

• Xfinity Advanced Gateways (XB6 or newer)
  • These gateways have been upgraded with software that manages advanced WiFi settings automatically to help optimize your home network and provide the best performance possible.
  • Some advanced WiFi settings for gateways with this software enhancement are not visible and cannot be managed from the Admin Tool or Xfinity app.
• Xfinity WiFi Extenders
  
  • WiFi Extenders require that you only have one WiFi network name and password.
    • This allows all your devices to seamlessly connect to the network that will provide the best WiFi signal at any given time.
    • Advanced WiFi settings aren't visible and cannot be managed from the Admin Tool or Xfinity app.