A few days ago we noticed with Applesfera that a small group of iOS WhatsApp beta users They were already tested in black mode, another method used to change the white to gray and black. It was not a job that was available to all members of the testing program, arriving within days.
It is now available to all iOS WhatsApp beta users
However, All iOS WhatsApp beta participants in TestFlight They recently received a new update that includes, finally, a long-awaited black mode. Release notes don't include much detail other than "Black Mode!" (Dark mode!)
If you want to try dark mode and aren't part of the TestFlight beta program, sorry, but there are no vacancies. The good news is This function should not take too long to reach all users through a strict version
Source | MacRumors