This is the value that the App has changed:

which is the AC Charge 1 Upper SOC % Limit, but that is not the value that is set by WW, normally. This is AC Charge Upper % Limit instead.

So, looking through the logs, WW alters these registers:
Enable AC Charge Upper % Limit
AC Charge Upper % Limit
AC Charge 1 Start Time
AC Charge 1 End Time
So, I guess this is by design, but in the AIO we appear to be getting different outcomes.
I will report back tomorrow AM - work allowing