I just bought a refurbished Zf from Nikon USA. I was exploring the Nikon website and saw there's a FW update:
Changes from C Firmware Version 3.00 to 3.01
Changed the way the aperture was adjusted on a lens when the standby timer expired.
Fixed an issue where the i menu touch control would sometimes not be available in the [Prioritize viewfinder (1)] and [Prioritize viewfinder (2)] monitor modes.