Gmail number notifications on icons missing on android

[Android Central Question]

I've read countless posts about this, all the ones here and in other forums.
However, none of the recommendations given have worked for me, I tried quite a few.
I have a Samsung Galaxy S6 phone.
Android 7.0, Kernel Version 3.10.61-13327150
Knox version 2.7.1
Android security patch level 01/03/18

I've reset app preferences
checked sync which is fine
notifications are correctly setup
deleted gmail acct and installed again.

I've never had a number notification on icon for gmail, but yes for all other icons.
My husband has a newer Samsung A5 and has notification numbers on gmail icon.

Don't know what else to try, would appreciate any help, thank you.

 

[methodman89]

Do you see the option in settings? Are you sure your os is supposed to have this new feature?