Hi @Treblstef,
Welcome to the Roku Community!
We're glad you reached out. Just wanted to let you know that the Roku 4 won't be getting the latest software update anymore. So, most channels might have updates that won't work with this model. Also, after checking with Apple TV-supported devices, turns out the Roku 4 (4400X) is no longer supported. That's probably why you can't find the channel.
You might need to upgrade to our latest devices and check for the available offers you are eligible for here at my.roku.com/upgrade.
Just let the Community know if there's anything else you need help with.
Thanks,
Rey
ERey.
Roku Community Moderator