Please add guest AP to Xfinity gateway

I recently added XFi complete package and used Xfinity gateway for a few days, but I lost my guest network, and all IoT devices, thermalstats, EV charger, smart lamps cannot connect to 2.4G network. Even printer won't connect. I used to have printer connected to main 2.4G and IoTs connected to guest AP. I had to set gateway to bridge mode and use my own router again.

The Xfinity gateway wifi range is very good indeed, but no guest AP is a big deal to me. Those devices cannot use xfinitywifi AP. Please add guest AP.