Some Tamron Di/Di II lenses will not work properly with the Nikon Z7, Tokina is still testing their lenses - Nikon Rumors | Camera accessories nikon, Cameras and accessories, Digital camera photography
Midwest Photo Tokina SZX 400mm f/8 Reflex MF Lens for Nikon Z
Amazon.com : Tokina SZ 500mm f/8 Reflex MF Super Telephoto Lens for Nikon Z, Black : Electronics
Most Tokina lenses are compatible with the Nikon Z7 camera (with a few exceptions) - Nikon Rumors