The default "Boot up" setting on the ZS EV is as follows :-
NORMAL drive mode and then Max Regen level 3.
I personally like this setting myself ?.
After the latest BMS update ( released 15TH Jan 2021 ) the Regen is more available at a higher rate of SOC now, the Regen is more linear and available at a higher level of SOC.
The increased range in "Eco" setting can also be achieved in the NORMAL mode if you are careful with the "Go Pedal" and reduce the heat demanded for cabin heat.
Eco mode automatically reduce's the level of heat provided to the cabin space, in order to conserve the range of the HV battery pack.
In "Sports" mode, the response from the "Go Pedal" will be a LOT sharper, but range will be consumed even MORE quickly than before !.
The range indicated by using "Eco Mode" can be achieved by the owner in "NORMAL" mode if the car is driven correctly by the user.