Apple released the beta 3 version of iOS 13.4 and iPad 13.4 to developers and general testers.
In the beta version released earlier, various features such as the redesign of the mail toolbar, the iCloud Drive feature, the new mimoji sticker, and the addition of CarKey were confirmed.

Apple didn’t disclose any changes in this beta, but according to international media Nine to Five Mac, it seems to have added “OS Recovery” to recover iOS to OTA.
Previously, iOS recovery required a Lightning cable connection, but OS Recovery is known to allow wireless recovery.