Apple has released the fifth beta of iOS 13 and iPadOS

The iOS & iPadOS 13 SDK provides support for developing apps for iPhone, iPad, and iPod touch devices running iOS & iPadOS 13. The SDK comes bundled with Xcode 11 beta available from Beta Software Downloads. For information on the compatibility requirements for Xcode 11, see Xcode 11 Beta 5 Release Notes.

Warning
If your watch is running watchOS 6 beta, you must update it to watchOS 6 beta 2 or later before updating to future versions of iOS 13 beta, otherwise your watch will no longer be able to connect to your phone. (52854192)

  iOS 13 and iPadOS Beta 5 released