this network is operating on wifi channels in use by several other nearby networks

I see many (closed) posts to this, but I can't find a resolution. I have Xfinity's xFi Gateway, 2Gbps internet service and 4 xFi Pods deployed, all online. I get this error with my iPhone 15 Pro, but it's erratic. I just replaced my iPad with a new one, and it also is getting this error. My wife has 2 iPhones with no errors at all. All iPhones are running iOS 18.1.1 and the iPad is running 18.2. My wife's HPE laptop also won't connect (Windows is far less verbose with the error...it just says can't connect). The common piece here if I'm correct is the devices with issues are running Wi-Fi 6E. I look at the router and do a spectrum analyzer - what a useless piece of junk. It doesn't even show the 6GHz channel. You can see some of the channels being used, but you can't change them to different channels so as not to use the same as your neighbors (I'm in a condo complex with 3 others). The other useless piece of information is the Wi-Fi security protocol in use. You can see it but you can't change it. For the 2.4GHz and 5GHz bands, they employ WPA2-PSK (AES), but for the 6GHz channel, it's stuck to WPA3-Personal Only. I can't change these. On some of these posts I've read that the Xfinity engineers can't either. Now, for Wi-Fi 6E WPA3 is mandated...it doesn't support WPA2. I can connect my Wi-Fi 6E devices to many other networks, including my office with no problem. That eliminates Apple. My wife's laptop runs Wintel, that eliminates the Wintel platform, which leaves Xfinity holding the bag. I have a third party (TPLINK) router that has 6E capability (and it works), but I don't want something hanging off my xFi gateway...I spent a lot of money on these PODs and service and expect it to work. So my question to the Xfinity engineers trolling these - what's the fix? Thank you.