On the 23rd (local time), Apple released the iOS 13.4.1 update for the second-generation iPhone SE.
This update includes bug fixes. We fixed an issue where devices running iOS 13.4 or earlier were unable to join Facetime calls with devices running iOS 9.3.6 or earlier or OS X El Capitan 10.11.6 or earlier, and were unable to select Bluetooth in the Home Screen Quick Action menu. Was also fixed.
The second generation iPhone SE model comes preinstalled with iOS 13.4. Buyers can install new updates immediately after purchase through Settings-General-Software Update.
Meanwhile, the second-generation iPhone SE will be pre-booked in Korea on the 29th of next week. The official release date is May 6th.