Most of those things are not eaten in the States, and are almost as hard to find in the USA as in Argentina.
Yes, we have tea bags- we have chamomille, and ginger, and spice, and green tea, and raspberry zinger and echinacea.
those sound like veterinary medicines for cattle, to me.
no christmas pudding, or jaffa cakes (isnt Jaffa in Israel?)
Baked beans here are punishment, usually at huge family buffets, the only thing left after all the good stuff has been eaten.
I think you are thinking about another continent, across a very big ocean.
You know, a country famous for bad cooking...