Hi! My FaceTime app is grayed out and unresponsive

Hello Conniestea,

We would like to see how we can help you with the FaceTime app not working as expected. If you delete the app and add it back with the steps in this link, does the issue return: Delete built-in Apple apps from the Home Screen on your iOS 14 or later or iPadOS device or Apple Watch - Apple Support

"Delete a built-in app from your device

1. On your iOS or iPadOS device, touch and hold the app.
2. Tap Remove App from the shortcut menu.
3. Tap Delete App from the submenu.

If you have an Apple Watch, deleting an app from your iPhone also deletes that app from your Apple Watch.

Restore a built-in app that you deleted

1. On your iOS or iPadOS device, go to the App Store.
2. Search for the app. Make sure that you use the exact name of the app.
3. Tap the Redownload button .
4. Wait for the app to restore, then open it from your Home Screen.

If you have an Apple Watch, restoring an app to your iPhone also restores that app to your Apple Watch."

Get back to us with your results so that we have a better understanding of the issue, and we can go from there.

Cheers!