How to show hide screen content when app is backgrounded?

[Corvas]

Earlier, one of the features on my galaxy device was 'app content in the background could be hidden'. But after the One UI 3.1 update, I see those feature is missing. 

Can anyone tell me if these features are really missing, or if I can access this feature in any other way.

Blur Backgrounded Apps (Hide Content)

[Corvas]

This is not a screenshot of samsung phone, I just used it for convenience, to show the content hide or blur of this background app.

[Anonymous]

ok

[Corvas]

This is not a screenshot of samsung phone, I just used it for convenience, to show the content hide or blur of this kind of backgrounded app.