Good afternoon HarnAg,
Welcome to the Apple Support Communities!
It sounds like you are trying to remove the AirPlay is Connected banner when mirroring from your iPad to your new Samsung TV.
What is the model number for your Samsung TV?
Apple TV App - Supported Devices
If you aren't seeing the Settings > AirPlay > Conference Room Display > Off setting it might be because you aren't using the Apple TV hardware
Manage AirPlay settings on your Apple TV.
It seems like you are using the Apple TV app on your Samsung TV instead, is that correct?
Get the Apple TV app on your smart TV or streaming device
- "For more information about the Apple TV app on your smart TV or streaming device, see the Apple TV app user guide.
- If you have issues installing the Apple TV app on your smart TV or streaming device, or connecting to the internet, contact the manufacturer."
If the issue persists, please reply to this thread and we'll do our best to help you!
Take care.