New Gateway Setup and Security

Hi all,

   I have a new Gateway/Modem setup and online (Vendor:Technicolor, Model:CGM4331COM). In resetting my Alexa speaker device, it logs onto the new gateway's wifi without the network password. The network name and password have both been changed. This suggests to me that the network isn't secure. Logging onto the gateway dashboard from my PC shows the wifi network is password protected. What am I missing? Thank for any advice.