Yes a very useful feature... [I've edited this post to give more detail]
In Custom Control f2 choose Preset Focus Point. It is f4 for the same function in the D6. It will return the AF point to where you want it eg in the top third of the viewfinder centred. And there are several options in the Z9 to customize a button of choice to the Preset focus point (in horizonal and vertical orientations respectively). Like the D5, D6, [see below] a D850 can also recall 2 different points for focus in both vertical and horizontal orientations.
One any of above cameras, you set this desired AF position with a pair of controls i.e. hold down the Focus Mode button [front of camera left] while pressing center button in Direction pad until AF point flashes; release both these buttons.