You call people living in Australia, Australians.
Australians call them "lifts", but the word "elevators" is not unknown.
Watermelon, Australians just have an accent.
A roof over a porch is typically called a "porch roof" or a "covered porch." It provides protection from the elements and can also enhance the aesthetic appeal of the porch area.
i presume you mean do Australians call us poms? if so yes
porch monkeys
KIDS
We call them thongs, and yes, many Australians wear them.
They hate abnormal people who call them Porch Monkeys.
Porch, stoop, overhang, eave
If it is an outdoors "grill", it is probably what Australians call a Barbeque. With increasing frequency, it is sometime known by its brand name as a Webber.
Australians commonly call chickens "chooks" (rhyming with looks).