Hi @Huronbase,
Maggie8k said the Oreos were matcha ice cream flavour, which I’d never seen before.
Here in Scotland they usually only sell the original Oreo or chocolate/strawberry varients. I had a quick search online and it sounds like the filling flavour is a mix of matcha and ice cream, rather than them being ice cream sandwiches that would be kept in a freezer (which would actually be kind of delicious!)