Apparently one needs a Sony body for this and some of the other excellent and interesting Voigtlander lenses (e.g. APO 65/2, 10/5.6).
It must be said that full manual focus works better on a Sony A7rIII+ body than on a Nikon Z; there is the (optional!) automatic magnification, and the frame rate of the Sony in magnified mode is much higher than the Nikon's.
The 50/1.8Z is imho an excellent lens, interesting indeed to compare it to this Voigtlander APO 50/2...