Not sure that "most" is the right word. "Some" might be better
I have an "Old School" dumb Rolec unit that is was installed way back in 2015.
Charging my previous PHEV to take advantage of cheaper "Off Peak" rates was possible, because scheduled / delayed / timed charging was possible by selecting the "ON and Off" charging times, via the head unit inside of the car.
When the ZS EV arrived in early 2020 the "Delayed / Timed / Scheduled" charging function was just not possible !.
At this time Rolec and Pod Point smart chargers, where the recommended wall boxes to suit the then new MG ZS EV.
But then it was found that owners could still not facilitate "Off Peak" charging.
After a few weeks, a ZS EV owner ( who was very skilled ) was able to able to control his car from a dumb wall box.
He kindly posted his progress on YouTube and owners like myself, where THEN at last able to gain access to the cheaper rate "Off - Peak" rates, by controlling the wall box from an App on their phone.
This was an absolute game charger back in 2015 and I am still using this facility to-date.
The face lift ZS EV does allow timed / delayed charging, but I have a feeling that this is single setting on a day by day basis.
This is fine - but I am not sure if you can set a seven day schedule ???.
Here is a example of what has been available on my App.
As you can see from the first image, I am currently charging ( cheaper Off - Peak all weekend ) and it is set to complete at 22.00 hours.
The lower image displays the facility to set a seven day scheduled charge cycle both ON & OFF etc.