Hi @Dorabell,
Welcome to the Roku Community!
We get that you installed the Roku App on your Samsung TV but are unable to access the Roku Settings. We would be more than happy to assist you with this.
To look closely into the issue, could you please confirm whether you are using a Roku device with this Samsung TV? This will help us provide you with certain information and troubleshooting steps on how to fix the issue.
Note: If a Roku device is not connected to this Samsung TV, access to the Roku Settings may not be available.
Thank you for your understanding and we look forward to your response.
Regards,
Riamie
Riamie D.
Roku Community Moderator