Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
I have a Roku Streaming Stick+ and I am based in Portugal. Disney Plus service was launched in Portugal in mid-September this year and it is announced everywhere that it is also available for Roku Devices.
So far I wasn't able to find the channel in the Roku Store and, as far as I was able to understand, my device supports this channel.
Please be aware that channel availability/access on Roku devices will vary from region to region. A Roku device will work in any location, however, channels may not be available on your device in that location, based on each channel provider's discretion. For more information, you'd want to contact any specific channel/service provider to inquire further about whether they offer their channel/service on the Roku platform in your region.