Hacker News Reader

Apple uses a laser infrared dot projector.

Other manufacturers cheap out on that part, or prioritize design (no notch/camera hole) over security.

"Cheaping out" is not the best description. Apple has riddled the space with a ton of patents. https://insights.greyb.com/apple-facial-recognition-patents/

Microsoft is using IR to do Windows Hello so there must be some workaround to the patents.