Changing Security Mode on XFI ADVANCED GATEWAY (XB8)???

Hello,

I recently got a new modem (the XB8).

I need to change my wifi security mode from WPA3 to WPA2 but it says "Wi-Fi Mode, Security Mode, Channel Selection, Channel Mode, and Channel Bandwidth are being managed automatically to help optimize your home Wi-Fi network and improve Wi-Fi coverage." in the admin.