On Monday, the Electra Team posted yet another update for the Electra1131 jailbreak tool to their official website.
Citing the official changelog, Electra1131 version 1.0.3 adds support for iOS 11.4 beta 1, beta 2, and beta 3, but this only appears to work reliably when using the developer-only multipath tcp version of the tool.
Looks like AirPort Express may not be getting a suspected AirPlay 2 upgrade after all.
Developers and public beta testers who installed the iOS 11.4 beta are noticing that Apple's AirPort Express wireless base station is showing up in the Home app as AirPlay 2 speakers.
Apple yesterday seeded first developer-only betas of iOS 11.4, tvOS 11.4 and watchOS 4.3.1, with the iOS and tvOS betas reinstating a pair of missing features that we were promised at WWDC back last summer: AirPlay 2 and Messages in iCloud.