So far only the mate 20 pro has followed Apple in this endeavour. The rest of them seem to be forging ahead with in screen finger print sensors.Yes, they are! Basic facial recognition and Face ID are not the same thing. The technology the latter uses is far more advanced and Apple spent millions on R&D which is why you only have one phone in the entire Android ecosystem which has a Face ID equivalent.
Samsung could afford to make a Face ID clone if they wanted to. But all rumours point to them having an in screen FPS on the S10.