Absence of secure folder and Knox security

[Aplily]

It is really disappointing  Samsung m31  does not support  secure folder  and Knox security. I am a user of Samsung  from last 10 years.i bought  m31 and it disappoint me. I only bought  Samsung 31 for its secure folder.if it doesn't resolved I will switch to other company 

[vas52]

Then in M31 is there any way to hide a folder with some important applications? Alternatively is there any way to hide an application ??

[vas52]

In M31, how to resolve proximity sensor problem?