Soon after Apple released iOS 12.2 dev beta 6 on Monday, March 18, it sowed the public beta version. So far, from what we can tell, the sixth beta contains a patch for an Apple Pay problem and another update to the "About" page of the Settings, this time with a new section for warranty and insurance information.
The biggest change we've found in beta 6 is this warranty and insurance status. If you purchased AppleCare +, see the "About" section with an expiration date. If you did not buy AppleCare and your iPhone is less than one year old, see "Limited Warranty", including warranty expiration date. And if your iPhone is relatively new, you also see options to purchase an AppleCare + plan immediately if you don't already have one.