Wireless display app is useful for wireless display adapters and you can quickly access it from the notification bar. The app runs perfectly on all devices with 4.2 and up versions of androids.
How to use the Wireless Display App
first, check whether your TV supports wireless display.
Your mobile and TV must connect to the same network.
Click the “Connect” button in the app and choose your TV.
There are two reasons expected, first your screen may not support a wireless display adapter and second is that your TV may not connect with the same network connection.