Why can’t I aiirplay on my smart tv in my room

This support article from Samsung may help. It describes the process to turn on Airplay in your TV settings.

https://www.samsung.com/us/support/answer/ANS00082643/

This article describes a firmware update that may be needed for the TU7000 series Samsung TV's to solve an AirPlay problem.

https://www.samsung.com/us/support/troubleshooting/TSG01206424/

Does the TV have AirPlay built in? Apple TV app - Devices - Apple (EG)