I prefer to set the scheduling on the charger otherwise you'll need to mess about in the car when you're at a public charger to turn off the scheduling to get a charge.
Given the very high cost of public charging these days, plus the increased range that the Trophy LR offers, I never use public chargers TBH.
Yes I do clearly see your point, if you are public charging a lot.
But it is very easy to switch off the delayed charging function in the head unit, before you leave the car, if you do find the need to public charge.
I guess it will be different from person to person, but maybe having a delay function settings in the wall box App plus another similar delay charge facility in the Ismart App AND again in the head unit of the car can be a little confusing ?.
I have found, that some times if I make a change in the delay times in the Ismart App and then send it to the car, it reports the command as okay, but it has not updated the times and disregarded the change ?.
My wall box is completely dumb so has no "inbuilt" timer function now.
When we had the Gen 1 ZS EV standard range in 2019 it had no facility to delay charge via the "Off Peak" tariff we had at the time.
The fix to gain this function, was to install a Wi-Fi relay inside of the wall box.
Then the timer settings where controlled via a free downloaded App on my phone.
This worked brilliantly for about 18 months.
When we upgraded to the Gen 2 facelift ZS EV LR this was then no longer required and was disconnected.