Nikon Z 8 Reference Manual page 173

2
Choose the Active D-Lighting amount.
Hold the BKT button and rotate the sub-command dial to choose the Active D-Lighting
setting for the second shot when the number of shots in the bracketing sequence is 2.
The bracketing sequence varies with the Active D-Lighting amount as follows:
Amount
[L]
[N]
[H]
[H1]
[H2]
[AUTO]
Bracketing sequence
Off → Low
Off → Normal
Off → High
Off → Extra high 1
Off → Extra high 2
Off → Auto
173
Bracketing