The BitAxe uses an ESP32. It doesn't support 5Ghz. It connects via 2.4Ghz like most IoT devices.

You can see what the WiFi password is if you press F12 to enter the development console, inspect the element and change the attribute "type" to "text" from "password". The dots is just a standard password field in HTML that browsers render as dots.

It should support WPA-PSK2.