Face ID fail

Hey there, and welcome to Apple Support Communities Aungzayyatu,

We can certainly understand your concern and see you came to us from the article If an alert says Face ID has been disabled on your iPhone or iPad Pro.

We recommend checking out these steps from the above article for more information on what to do if you have issues with Face ID and see if it matches up your procedures.

" You might see the following message on your iPhone X or later, iPad Pro 12.9-inch (3rd generation) or later, or iPad Pro 11-inch (1st generation) or later:

"A problem was detected with the TrueDepth Camera. Face ID has been disabled."

What to do next

1. Update your iPhone or iPad to the latest version of iOS or iPadOS.
2. Check if there is an issue with Face ID in your iPhone's parts and service history. To do this, open the Settings app, tap General, then tap About.
3. If you still can't enroll your face or unlock your device with Face ID, you can take your device to an Apple Store or Apple Authorized Service Provider, or contact Apple Support about your iPhone or your iPad.

Only a trained technician should service your device. Improper repair, modification, or use of nongenuine Apple components in the laser systems might prevent the safety mechanisms from functioning properly and could cause hazardous exposure and injury to eyes or skin.

What the message means

Using diagnostics available in iOS 14.6 or later, Apple has detected an issue with your TrueDepth camera that might cause it to not function as expected. The TrueDepth camera contains lasers, which might be disabled for safety reasons if the device malfunctions or is damaged. This won't prevent you from using your iPhone or iPad, but until your iPhone or iPad is updated or serviced, you might not be able to use Face ID, Animoji, Memoji, and some other features that use the front camera. "

These steps will help ensure your device is working with ease and can fix common issues like the ones you’re experiencing.

Kindest regards!