Nikon has released the new version 2.4.0 firmware for the Nikon Z50, and it looks like the focus (no pun intended) for this one is eye-detection autofocus. Among other eye-detection AF performance improvements, the big one is eye-detection autofocus being added to the camera’s AF modes while recording video.
The last few updates for the Nikon Z50 have essentially been bug fixes or adding support for various new lenses. This one actually brings a new feature that should make the Nikon Z50 a much more attractive option for activities like vlogging. The notes for the new firmware all list improvements to the Eye-AF system.