We understand from your question that you saw a red light next to your Face ID sensor. We can certainly help you with this! This is the IR sensor for the Face ID module on your phone.
In this manner, Why is there a red light on my camera?
Security Cameras have small Red Lights (sometimes Other Colors) to indicate that there is a recording in progress. For cameras that are constantly on, that light will also be on 24/7. For other Cameras, like the Blink, the light will only come on when motion is detected and a clip is recorded.
Furthermore How do I turn on the red light on my iPhone?
How to turn your iPhone screen red
- Go into your Settings app.
- Select General.
- Select Accessibility.
- Select Display Accommodations.
- Select Colour Filters.
- Turn Colour Filters on.
- Select Colour Tint.
- Below Colour Tint, two scrolling bars will pop up: Intensity and Hue.