Apple has released iOS and iPadOS 13.3 beta 2 to registered developers. The build number is 17C5038a. The update is around 250MB when downloading from iOS 13.3 beta 1.
The release notes point to little change on the user end, with new developer features and support for NFC, USB, and lightning security keys in Safari.
For live minute to minute coverage of this release, follow us on Twitter @AppleTerminal