if you actually read the paper you linked, you can clearly see the structured light pattern emitted by the laser. (https://media.springernature.com/lw685/spring

if you actually read the paper you linked, you can clearly see the structured light pattern emitted by the laser. (https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fs41598-021-01763-9/MediaObjects/41598_2021_1763_Fig2_HTML.jpg?as=webp https://media.springernature.com/lw685/springer-static/image... or figure two.) Also the patent I linked was filed in 2020, after faceID was rolled out.