Apple TV apps
One of the reasons I updated my Apple TV is the App icon. An app I wanted does not show on the Apple TV although I have it on my other devices.
What is your model Apple TV? Identify your Apple TV model - Apple Support
Please disclose the app that this is about.
Some apps are available for iPhone, iPad, and Apple TV. But some others do not have all three versions. That decision is up to the developer/publisher. You can look it up by searching for
<app name> site:apps.apple.com
The available platforms are first listed near the top of the app page, in the screenshots section.