After the firmware Update of the NFZ Adapter to V1.21, it works perfect on my Zfc and Z30, with the DC AF-S lenses I have.
Aperture and Focus can easily be adjusted by the camera. Tested on Nikon Nikkor AF-P 10-20mm VR.
The manual lenses, like the old MF 35mm/2,0 AI-S, does fit, but you can not adjust manually nor with the camera the Aperture. Of course.
I do not think it is a firmware, I think it is a build problem.
If you need to adjust the aperture on the older AI/ AF-D lenses, use other MF adapter for it.
But if you need your AF-S/AF-P lenses with working AF, and Aperture, this adapter is a great choice.
Best regards
GJ