Nikon Z8 User Manual page 554

Taking HDR Photographs
We recommend that you use matrix metering when shooting with HDR.
1
Highlight [HDR overlay] in the photo shooting menu and
press 2.
2
Select an [HDR mode].
Highlight [HDR mode] and press 2.
Highlight one of the following options using 1 or 3 and
press J.
If [On (series)] or [On (single photo)] is selected, an icon will
appear in the display.
480
HDR Overlay