Confirm your Fire TV Stick and iPhone/iPad/Mac are on the same Wi-Fi network
On the Fire TV Stick, go to Settings
Select Display & Sounds
Select Enable Display Mirroring
On iPhone or iPad, open Control Center
Tap Screen Mirroring
Select your Fire TV Stick from the list
Enter the AirPlay code if prompted
On Mac, click Control Center or the AirPlay icon in the menu bar
Select Screen Mirroring or AirPlay Display
Choose your Fire TV Stick
Enter the code if prompted
If your Fire TV Stick does not support AirPlay, install a third-party AirPlay app from the Amazon Appstore
Open the third-party app on the Fire TV Stick
Repeat the AirPlay or Screen Mirroring steps on your Apple device