It was intended as a security testing utility for users to see if their own routers were vulnerable to default password algorithms.
: You can see the password for any network you've previously joined by going to Settings > Wi-Fi , tapping the "i" icon next to the network, and then tapping the Password field (requires FaceID/TouchID).
: For technical details like signal strength or channels, you can use the AirPort Utility app from Apple. You must enable the Wi-Fi Scanner in your iPhone's main Settings menu under "AirPort Utility" first. GWPA Finder 5.2.7 Free Download