Apple has posted the fourth developer betas of iOS 13.1 and iPadOS 13.1, even thought the non-beta versions of iOS 13 and iPadOS 13 aren’t due for release until tomorrow.
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.
