I don't know the answer to your question, but I recall in early 2021 during the transition to newer version they were referring to that feature as "improved cooling" (or something like that). On the Aus webpage, if you found that line item as a feature on a particular car, you knew that car had the 11kW on-board charger. That makes me think it's more than just swapping the charger out for a bigger one. The 11kW charger potentially needs beefier cooling of its electronics than they shipped in the earlier versions (you might have noticed the sound of pumps and trickling water while you're charging).
You probably know this already, but just in case... even when you do have the 11kW charger you can only take advantage of it if you have 3-phase power. If you're charging at home, and your house is only single phase, it'll revert to 7.4kW. EVSEs (aka wallboxes) at commercial premises or large apartment complexes are typically 3-phase around these parts. Also a lot of the high speed DC chargers around Aus have an additional 3-phase type2 EVSEs alongside as a backup to the DC charger being out of order or in use, so having the 11kW onboard charger is an advantage there too.
One final tip: if you find you are stuck with the 7kW charger and you plan to use untethered type2 EVSEs away from home, consider upgrading the supplied type2 cable they included in the boot. Most of us have found they shipped 20A cables (check the label on the plug handle), which is a good match for the 11kW cars, but with your car you'll find you only get 4.6kW through that cable (more on that in this thread