Months after using Comcast XB7 modem, WIFI network has disappeared on my laptop. Appears fine on my Iphone. Can see neighbors networks

I am using the Comcast xb7 modem. Everything worked fine for 2 months then 1 day my laptop no longer locates my Wi-Fi network. I can see all of my neighbors networks. My iPhone locates my wifi network. It shows up in the known networks but will not come up on the list. Unable to get a hold of anybody at Comcast. Anyone have any help for this? I have to use the ethernet cable right now to get on the Internet but would like to use the Wi-Fi. I have tried going into the admin tool for the router to change the mode from 802.11 g/n/ax to just 802.11 g/n but it does NOT allow me to change any of those settings as they are all greyed out. I have done a hard reset on the modem and still the same issue. No new updates for any of the WIFI drivers. I uninstalled them and reinstalled them with the same issue. Any ideas?