https://www.cnet.com/news/galaxy-note-9-no-under-display-fingerprint-reader-kgi/

It looks as if the upcoming Galaxy Note 9 may not sport a fingerprint reader underneath the screen after all. 

According to KGI analyst Ming-Chi Kuo (via AppleInsider), who previously speculated himself that the phone would have the sensor, Samsung is postponing the feature due to technical difficulties.