One handed mode like pixel phone

[Communicator]

Anyone know how to enable one handed mode like pixel phone as in this screenshot? 

Even one hand operation plus don't have this feature.

[NOOB_1ST_ACC]

But not while using apps

[Communicator]

Even while using app you can not use lower part of screen you can check it in your WhatsApp, chat icon not visible in right bottom side in WhatsApp, I have checked with every app, not working in any app.

[TechiePradhumn]

How to do this?
Second screenshot.

[Communicator]

One hand operation plus app feature - pull screen down.

[TechiePradhumn]

Ok

[_Sara_]

Yeah, I understand that it's a matter of preference... I use one hand option very rare

[NOOB_1ST_ACC]

Attaching here because my comments are getting deleted.

[_Sara_]

Oh, right! In one hand Operation+ I should search it... now I got it! Idk why I was searching in the settings of the phone 🤣 🤣

[NOOB_1ST_ACC]

🤦‍♂️🤦‍♂️

[_Sara_]

And this are the available ones