Below is how to mirror Android Phone to smart TV easily you can try.
How to mirror Android Phone to smart TV easily step by step
You can use Chromecast to mirroring your Android device’s display on your TV. So you can give a demonstration, showing off photos or playing a game.
How to mirror Android Phone to smart TV easily with Chromecast software
Download Chromecast and open it.
Make sure you are connected with the same WiFi network as your Chromecast.
In Chromecast, go to menu and select Cast Screen/Audio.
Tap on the yellow button and followed by the device you want to connect to.
Once you begin casting your screen, an alert will appear in your notification shade, so you can stop mirroring with a tap.