Total Possible Garbage: Missing mystery-Jack-o-lantern

They may have temporarily pulled it from the store in order to fix the "missing Acorn Kirk" issue that I have seen many people complaining about. It was supposed to be available for the whole event - so at least you should still have plenty of time once they bring it back.

Edited to add: I'm on an iPhone and the jack-o-lantern is available in my store. So I don't think my answer is right (or helpful, sorry). I hope it gets sorted out for you soon.