Remove connected apps to AppleTV

Follow these steps and let me know if they help: To remove an Apple TV app that has been shared with you on your Apple TV, you need to access your account settings and manage the sharing permissions, usually by signing out of the shared account on your Apple TV device; navigate to Settings > Users and Accounts, then select the shared user profile and choose "Sign Out"; this will effectively remove their access to the shared Apple TV app on your device.