As I said, the app is not available on Amazon Store. You have to install it on your FireStick as a third-party app using Downloader.
Now follow these steps:
Step 1: Open Firestick Home
Step 2: Click on the Settings icon
Step 3: Select My Fire TV
Step 4: Choose Developer Options
Step 5: Click on Apps from Unknown Sources
Step 6: Click on Turn On
Step 7: Navigate back to the home page and select the Find menu
Step 8: Click on the Search option
Step 9: Type “Downloader” and select it from the list
Step 10: Select the Downloader icon
Step 11: Click on “Download” and wait for the app to install
Step 12: Wait until the download is completed
Step 13: Click on Open to run the Downloader app
Step 14: Once the downloader opens, click on Allow
Step 15: A prompt will be displayed, click OK
Step 16: By default Home tab would be open with a text box displayed on the right side
Step 17: Enter the URL “bit.ly/xciptv-2” in the URL bar and click GO. This link is V.5.0.1 apk which is the latest version of XCIPTV.
Note: The referenced link is the official URL of this app/website. FIRESTICKHACKS do not own, operate, or re-sell any app, streaming site, or service and has no affiliation with its developers.
Step 18: Wait for the app to be downloaded
Step 19: Click the Install option
Step 20: Click Done or Open once the app is installed
Congratulations! The XCIPTV app is now successfully installed on your device.