none of those included Cool Whip, but I have seen recipes that will call for some sort of frosting and Cool Whip will be substituted for it.
I've found that if someone adds pineapple or mac nuts to anything, they automatically name it Hawaiian whatever.
I've been to many bakeries there, restaurants and eateries, to include homes of the locals. Never heard of it.
Have sat with a few wedding cake makers and none of them had even mentioned it either.
Does it mean it doesn't exist there? No, just never heard of it, that's all