https://wccftech.com/beta-4-of-ios-13-4-tvos-13-4-macos-10-15-4-now-available/

Apple has released the fourth betas of iOS 13.4, tvOS 13.4 and macOS Catalina 10.15.4 for registered developers.

Today is an interesting day in terms of software releases. Apart from WhatsApp dark mode making the cut for iPhone users, Apple has jumped into the scene and has seeded fourth betas of iOS 13.4, iPadOS 13.4, tvOS 13.4 and macOS 10.15.4. All of these updates pack bug fixes and performance enhancements and it is recommended that you go ahead and download them right now.