Landscape mode doesn't work
1) If you're mirroring your screen and landscape mode doesn't work, try casting instead.
2) Tap on the cast icon
3) Select your device from Connect to a device list., e.g., AirPlay & Bluetooth devices.
4) Follow the next steps as they display on the screen.
See the articles below to learn about casting.
Please make sure to enable the Local Network on your device. You will find that option under the Settings section.
If you’re trouble with casting, try casting to web: see video.