Flooding a camera and other underwater photo gear is a nightmare for all underwater image-makers. Unfortunately, if you work underwater long enough, at some point, you will experience the horror of a flood. Over the years, I have flooded a Nikonos V, a film camera, a housing, several strobes and some dive lights. I have also had minor floods on a few digital camera housings.
All Nikon Z6/7 II camera controls can be accessed (on/off switch, shutter release, shutter speed, aperture, program dial, main dial, push buttons, lens release, FN1, and FN2).