From Sigma:
Operating condition of Nikon “Z7” and SIGMA’s interchangeable lenses for Nikon mount
Thank you for purchasing and using our products.
We would like to announce that we have confirmed that SIGMA’s interchangeable lenses for Nikon mount in the current lineup do not have any issues with general operation when they are used on the “Z7”, released by Nikon Corporation, via their “Mount Adapter FTZ”.
In addition, please note the information below when using the following lenses.
We will continue verification and provide updates on the operating conditions including discontinued models.