Are there regional Australian accents?
The regional accents are there but they are faint. There is an accent from Adelaide which is influenced by the mass English immigration of the 50s, there is supposed to be another accent in the New England area around Armidale, but I have never noticed it. I was born and raised in central Queensland and lived most of my teens around Brisbane. I did not hear the “hey” at the end of sentences until I went to the north-west Mt. Isa / Cloncurry region for a few months. Queenslanders can sometimes hear a Melbourne accent but it isn’t all that different from that around Brisbane. The real difference is between “broad” Australian and “educated Australian”. Both of those accents are more of less nationwide. You will hear more “broad” Australian in small country towns but it isn’t universal even there. Most of the reason for this is that a lot of people in Australia move from one town to another and even interstate. That mixes things up all the time.