Get list of all available WiFi networks on iOS

You can't unless you have a business case to backup your request to apple developer for an entitlement.

Well, you can’t full stop. With reference to the hotspot helper stuff, that still won’t give you access to real-time Wi-Fi scan results.

For more on this, see TN3111 iOS Wi-Fi API overview.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"