secure folder

Goto secure folder, tap 3 dots menu, tap settings, turn off "Show icon on app screen". Now you have to goto settings, biometrics and security, Secure Folder for each time you want to get in to Secure Folder.

Alternatively, Pull down notification bar, tap 3 dots menu, tap button order, drag and drop Secure Folder on quick settings, tap save. Now you can simply hide/show Secure Folder without heading over to settings.

The apps you add to Secure folder is installed as new app in there.
Those two apps are different like dual messenger feature.

That's what it is..secure folder creates secured copy of particular apps inside secure folder, don't treat secure folder as like other app locks..In this way you can store your private documents/photos and other stuffs inside those apps (available in secure folder..)