Make FireTV app available in Australia

When I follow the link to the FireTV app, I'm blocked from installing it. I get the message "You are not eligible to purchase this app due to geographic restrictions."

Is there any reason to restrict the app from being available in Australia? Android and iOS apps don't have this restriction, so I suspect this is an oversight. Can this restriction be removed?

It's possible that the restriction is from Amazon, not Channels.

What does it say when you click on the (Why?) link? appears to only list the Channels for HDHR app

You can side load it...