Vertical app drawer is missing in one UI 6

[Jibintgultra]

Now am using Novo launcher 

[Zammi]

Samsung never had vertical app drawer.
But in One UI ,Good Lock + Home Up module does that.

[Jibintgultra]

Check in home up

[Samsung_specialist]

Kindly be advised that Novo launcher is third party application. So, you need to check with the application developer. Please clarify your inquiry, in order to assist you better.