Samsung has launched a new feature called AltZLife that lets users run specific applications in 'Regular Mode' and 'Private Mode'. Switching from the former to the latter requires you to input a password every time. The feature is available on Galaxy A51 and Galaxy S71 handsets in India.
https://www.notebookcheck.net/Samsung-s-new-AltZLife-feature-lets-users-create-a-Private-Mode-for-supported-applications.485162.0.html