"ONE TAP LOCK BUTTON" not available in my note 9

[matty11]

Hello guys
I recently bought my new note 9..
I can't find LOCK BUTTON ON SCREEN .. I ain't talking about lock button on right hand side panel.. I am talking about virtual button on screen which we can press and phone shall be locked. Without pressing right hand side lock panel button.. I have attached screenshot of such "lock buttons"..

Kindly help me to find it.. I think it was available in older version of note 9.. 
Plzz help..!!

[Anonymous]

use the edge panel see this

[Raviijangra]

👌👌 smart way Shinchan

[matty11]

the last option LOCK isn't available in my phone 🙄😐

[Anonymous]

download the soft key edge it is free

[matty11]

it comes u under edge panels options..

[Anonymous]

what is the problem with it any way

[thecoolboy]

i bought the galaxy A50 last week
tha device is nothing improves like other galaxy device .. am facing same problems ,like (heating problem, perfomance slow , slow fingerprint sensor irritating ads

[Bibhab123]

use good lock with nav bar u can have lock screen botton

[matty11]

whr can i find it??