Each bar is wrapped in cellophane, which are then wrapped in the normal outer packaging. To make the 4 pack, they simply took 2x two packs and put them on a cardboard tray,and then wrapped those.
I don’t think I’ve ever gone through so much unwrapping for candy.
Even WWF doesn’t think avoiding palm oil is a good solution. Not short term and definitely not long term
https://wwf.panda.org/discover/our_focus/food_practice/sustainable_production/palm_oil/
Palm is the most efficient crop for producing a wide range of fats. Replacing it with some other source of fat will require more land and water, and disrupt nature in another part of the world.