I've recently been using a roku2 Telstra TV 4200TL. . I was impressed by the user-friendly interface . Allowing 4G mobile data hotspot connectivity .. providing access to Netflix ,STAN ,Binge , prime, Disney plus etc.... As well as multiple apps for free to air TV. 7plus, 9now 10play ,, . Then last week I upgraded to the Roku express 4k+3941x . What a mistake useless. And it can't even be repurposed as a doorstop as it's too light . Unless I cloak my Australian identity with the USA VPN. The Roku app doesn't work account cost because I don't have a router... Rant rant rant !! . Android I'm coming home
Roku devices aren't supported in Australia other than those Telstra branded devices. The two devices use different Channel Stores and as you've discovered not all channels/apps are supported in all regions. You take your chances when you import a device that isn't officially supported in your regions.
Discussion of VPNs to circumvent regional restrictions isn't allowed here:
Roku Community Guidelines - Roku Community