Firmware 2.50 for the Z50.

Nikon released firmware update version 2.50 for the Z50:

-Added support for the power zoom feature on power zoom lenses.

downloadcenter.nikonimglib.com/en/download/fw/493.html

The "Supplementary Firmware Update Manual" goes into more detail on the changes:
download.nikonimglib.com/archive5/U1Jzc00Umy0Q06u04pe01wNOcA79/Z50_FU2.5_addendum_(En)04.pdf
- +/- buttons can now zoom the lens
- you can adjust zoom speed in camera menu
- you can save zoom position when the camera turns off
- and the camera should display the focal length on the rear screen (PZ lenses only)