won't let me play Apple TV on my Roku stick

Hey there butch307, 

It sounds like you'll want to follow the steps found within Get the Apple TV app or Apple TV+ app on your smart TV or streaming device,

"How to get the Apple TV app or Apple TV+ app

1. Go to your device's app store and search for the Apple TV app or Apple TV+ app. If you don't see the app that you're looking for, check your device's compatibility.1
2. Download the app.
3. Open the app and follow the instructions to complete setup.

If you're not signed in with your Apple ID, open the app and go to Settings > Accounts. Then choose a sign in option.

• Sign In On Mobile Device: Use your phone's camera to scan the QR code on the TV screen. Then follow the instructions on your mobile device.
• On This TV: Use your TV remote to manually sign in with your Apple ID and complete setup.

If you can't watch content, you might need to get your Apple ID ready for purchases.

Don't have an Apple ID? Learn how to create a new Apple ID. Or if you forgot your Apple ID password, learn how to reset it.

Use the Apple TV app

• Rent movies
• Buy movies and TV shows2
• Subscribe to watch Apple TV+
• Subscribe to Apple TV channels
• Watch Friday Night Baseball in the Apple TV app

Use the Apple TV+ app

• Subscribe to watch Apple TV+
• Watch Friday Night Baseball with Apple TV+

Reset the Apple TV app or Apple TV+ app

Resetting the Apple TV app or Apple TV+ app removes your personal information and restores the app to its original settings. If you plan to sell or give away your device, or uninstall the app, you might want to reset it first.

1. Open the Apple TV app or Apple TV+ app.
2. Go to Settings.
3. Choose the Reset option.

If you lost or can't access your device but are still signed in to the Apple TV app or Apple TV+ app, remove the device from your Apple ID device list.

If you reset the Apple TV app or Apple TV+ app on a smart TV that's also signed in to the Apple Music app, the Apple Music app restores to its original settings."

Have a good one!