Apple has released iOS 13.4.5 and iPadOS 13.4.5 developer preview Beta 2 update, Apple also rolling out the second test version of watchOS 6.2.5 to developers. The internal version number of this update is 17T5590d.
Earlier, Apple released the official version of watchOS 6.2.1 update, which fixed that devices running watch OS 6.2 cannot join Face Time audio running on devices running iOS 9.3.6 and earlier or OS X EI Capitan 10.11.6 and earlier. The problem with the call.
Users who install the update need to ensure that the Apple Watch is charging and within the communication range of the iPhone that has been connected to the wireless LAN.