We've got a 2024 build Ocean and I can't find any option to control the parking heater in either the "Cali on Tour" or "Volkswagen" apps.
So far, the only useful thing I have found in the Cali on Tour App is the ability to control all the internal lighting. Handy if we've climbed up to the roof bed and forgotten to switch the lights off downstairs. Just have to remember to take my phone up their in the 1st place!!!!
It would be useful to be able to control the heating from the Cali on Tour app as well, so the temperature could be adjusted from the upper bunk. Easier than reaching over to the control panel, although not the end of the world to do so.
Long distance remote control through the Volkswagen App would also be handy to switch on the heating in advance of returning from a long walk etc. I know you can set a departure time on the control panel which is great if you know roughly when you will be back.