No, AF-Single works just as it always has. It focuses one single time. Once it focuses, it stops, you can recompose, or your subject could move closer/farther, and you will be out of focus.
AF-Continuous does not work as it always has. AF-C is WAY more sensitive on Z's, and perhaps to a fault. With DSLR's you can hear the lens settle into focus. With Z's you can often hear the lens continually (nervously) adjusting, and often wanders out of focus. It is so sensitive that it reacts to your breathing. If you have a lens with focus breathing you'll notice the adjusting a lot more. I've focused on stationary subjects and in about 2.3 seconds noticed refocusing. Less so on my Z7II compared to other Z's.
The best example of this I can demonstrate is focusing on a cup of pens in Wide(L) or Full Area Auto. The camera will keep searching for the closest subject (or switching between contrast detection, I'm not 100% sure.) Some sort of setting is needed to favor the initial focusing point. I could this being incredibly frustrating when bracketing in a studio setting.
I used to leave my D500 in group AF-C and shot with more confidence regardless of what mode I was in. However, the accuracy and lens sharpness it that much better on Z's, at the cost of some missed photos, so I take more images as one should anyway.
Nikon just needs to add some sensitivity settings that we could adjust accordingly. The g4 and g5 settings should accomplish this (YT Monochrome Memoires mentions this,) but I saw not noticeable difference in my tests.
Question,
In AF-S with eye
if I bracket 3 shots while holding the BBF would it refocus before each shot while bracketing?
In other words: while bracketing in AF-S is each shot considered a new shot which requires a focus before it will releases the shutter? would the camera stop bracketing/firing if for any reason its can’t focus?