Apple has posted developer betas of iOS 13.2, watchOS 6.1, and tv13.2. The first includes support for Deep Fusion camera tech on the iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max.
Registered developers can download the betas via Apple’s developer portal (https://developer.apple.com/account/#/welcome). Or they can be downloaded over-the-air once the proper configuration profile has been installed from the Developer Center.