Appleがデベロッパー向けに iOS 13.2 beta 3 (17B5077a)、iPadOS 13.2 beta 3 (17B5077a)、watchOS 6.1 beta 4 (17S5076a)、tvOS 13.2 beta 3 (17K5078a) を配布開始
https://developer.apple.com/news/releases/