The Z6 can depict “zebras” in the EVF where parts are over-exposed, but I haven’t played with it. I think, however you determine exposure to preserve highlights, you’re going to have to deal with some kind of “lift” curve to yank the low parts of the image into visibility.
I think the important thing to do is to test the behavior, make multiple exposures of high and low dynamic range scenes, and inspect the raw histograms to see where the data goes. It’s really just ETTR, with different tools.