Update: The latest beta of iOS 12.2 is now available to the public, not just developers.
Apple just released the third beta build of iOS 12.2 to developers this morning, bringing a bunch of fixes and new features to the iPhone and iPad.
iOS 12.2 beta 3 arrived just over two weeks after developers received the last build. There are also new betas out for tvOS 12.2 and watchOS 5.2 to go with the macOS 10.4.4 beta that came out yesterday.