A few Nikon Z7 AF tests/reviews/feedback videos:
Darryl Carey tested the Nikon Z7 and the Panasonic GH5 for AF tracking and the Nikon appears to be better.
The AF talk starts at the 11:10 mark.
The AF test discussion starts at the 18:00 mark
Nikon Z7 video face detection autofocus.
More Nikon Z7 AF test videos:
The Nikon Z7 is now in stock at Adorama and Amazon.
If you have any Nikon Z7 related question, you can post them in the Nikon Z Facebook Group (with over 8000 members already) or in the NikonRumors Forum.