Anyone who has taken a selfie with their smartphone is familiar with switching from the back-facing camera to the front-facing camera before taking the photo. Often called selfie cameras for their most popular use case, front-facing cameras are also used for video calls and as part of a facial...
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Apparently it is possible. Sending and receiving of IR from a specially designed screen that allows both photography and IR.
But I doubt Apple wants to spend the money.
Cheaper to tell us what we want than give us what we want.