Why is apple tv+ not available on Roku

Hey there!

Good news! The Apple TV app is available on Roku! 
You can find it here: Apple TV on Roku

Just a heads-up: not all Roku devices support it. To check if yours does (based on model and country),

To find this information, go to the home screen on your Roku device and select Settings > System > About. The models below support the Apple TV channel.

More info here: How to use the Apple TV channel on your Roku® streaming device | Official Roku Support

Thank you!
Mary 
Roku Community Team