Check if your Fire TV can screen mirror. To check, hold down the Home button on the Fire TV remote. If you see a Mirroring icon, your device is compatible. Connect your Fire TV and the device you want to mirror to the same Wi-Fi network. Move your devices within 30 ft (10 m) of each other. For more help, try our Amazon Fire TV forum.
https://www.amazon.com/gp/help/customer/display.html?nodeId=GA7K5AML6222YDEW

