Social network started testing the updated design on the site. It also has a dark mode, but is currently available to a limited circle of people.
If you are not one of them, but use the Google Chrome browser, you can activate the dark theme in this way:
But keep in mind that this display will not look identical to the official design. But in general, you can test the dark mode on the social network.
As soon as the update reaches you, you will see a notification on the site with an activation offer.