Made to request, but ultimately available. After a few months in the testing phase of users enrolled in the TestFlight beta program, dark WhatsApp mode has come to the official version of iOS.
Apple introduced the long awaited iOS 13 "Dark Mode", a feature of that change the bright colors of the display
Dark mode uses iOS 13 APIs
Although the black WhatsApp mode for the iPhone had been tested for months, the final test version was found to be continue to use iOS 13 APIs
Finally. Dark mode on WhatsApp. #DarkMode pic.twitter.com/o4Ee5H7qpW
— WhatsApp Inc. (@WhatsApp) March 3, 2020
When using iOS 13 APIs, Only users with an iPhone have this version an app (or later) can use it. However, this does not mean that WhatsApp will stop updating iOS 12 users, in contrast, they will continue to receive news, but not in black mode.