Apple still has plenty left in store for iOS 13 before moving on to iOS 14 (which we will likely hear about this summer at WWDC). A week after the release of iOS and iPadOS 13.3.1, it began beta-testing iOS 13.4. This point release brings several welcome new features.
Update 03/24/20: Apple has released iOS and iPadOS 13.4.
What’s new in iOS and iPadOS 13.4
iOS 13.4 and iPadOS 13.4 add significant new features. For iPad users, you'll get new support for bluetooth keyboards and trackpads, making productivity tasks a lot easier. Developers can now publish apps and in-app purchases as "universal purchases" that work across Mac, iPad, and iPhone. And iCloud folder sharing is finally here.