XB7 Mobile and WPA3 Triband activation

I’ve spent weeks trying to turn on WPA3 wireless security to get 6E WiFi turned on the Xfinity XB7 mobile. An Xfinity Store manager said it was possible, but the app and IP of the model have only WPA2 as an option. Anyone have any luck? I found posts older than a year with this same issue and no solution.