When Face ID will be supported in iPhone 8

The iPhone 8 does not have the required scanning hardware that enables FaceID. If FaceID just used an image it would be trivially easy to bypass with just a photo. On the phones that have Face ID you are identified by a 3D infrared scan of your face. That’s what the “notch” is for; it contains the IR emitters. Phones that don’t have that hardware can’t offer FaceID.

The only iPhones that will ever support Face ID are the X series and the 11 series, and whatever comes next, IF it does. Face ID isn’t particularly useful if you are wearing a mask. No other phones have the needed hardware.

Face ID is not possible on an iPhone 8.