Apple has released the second beta of tvOS 13.3 to registered developers

Update your apps to use new features, and test your apps against API changes.

Overview

The tvOS 13.3 SDK provides support for developing tvOS apps for Apple TV devices running tvOS 13.3. The SDK comes bundled with Xcode 11.2 available from the Mac App Store. For information on the compatibility requirements for Xcode 11.2, see Xcode 11.2 Release Notes.

Networking

New Features
Certain top-level domains (TLDs) such as .dev and .app are now in the Foundation URLSession and NSURLConnection HTTP Strict Transport Security (HSTS) preload list. An app which uses URLSession to visit a matching URL will always navigate to the URL as https://, and never as cleartext http://. See the HTTP Strict Transport Security (HSTS) Specification for more information about HSTS. (56247242)

  Release Notes