Problems with setting up new Apple I-phone

[CloudWatcher]

10. wifi password saved for you ...

If you're using it now, then some device you own has it saved. On MacOS there's the keychain utility that saves passwords, and with a few clicks, will show them to you. I'd go into more details, but you're not an Apple user so I'll skip that ...

But on windows there is this ability as well see https://support.microsoft.com/en-us/help/4023501/windows-find-wireless-network-password

hope this helps ...