Although there’s constant confusion when Australians talk about chips (at last my Aussie partner has learnt to call crisps crisps to avoid any mis-haps), at least they have their toastie language sorted.
Toasted sandwich = open sandwich done on a press
Jaffle = sealed sandwich done in a toastie maker (although the call it a jaffle maker)
But then some people call the toasted sandwich a toastie so who knows what’s going on.
Top toastie tip though, make home made pizzas one day, next day use any left over toppings for toastie filling excellence. And never underestimate the value that avocado brings to a toastie.