I was trying to set up my airplay and something happened where I exited the Apple TV app on my lg smart tv by accident and it messed it up and I can’t get the airplay to come up on my Apple TV anymore my tv pops up on my phone but won’t connect to phone.
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AirPlay and the Apple TV app are two independent functionalities on your smart TV, when supported by your device. One does not affect the other.
Use AirPlay to stream video or mirror your device’s screen - Apple Support
If AirPlay or screen mirroring isn’t working on your device - Apple Support
Add your AirPlay 2-enabled smart TV to the Home app - Apple Support
List of Apple TV app-supported smart TVs and third party streaming devices - Apple Support
AirPlay and the Apple TV app are two independent functionalities on your smart TV, when supported by your device. One does not affect the other.
Use AirPlay to stream video or mirror your device’s screen - Apple Support
If AirPlay or screen mirroring isn’t working on your device - Apple Support
Add your AirPlay 2-enabled smart TV to the Home app - Apple Support
List of Apple TV app-supported smart TVs and third party streaming devices - Apple Support
Airplay issues
