I can't enable notifications icons badge on Moto E5 Play I have a Moto E5 Play with Oreo 8.1(Android Go) and I can't enable notification icons badge, I mean those little dots over the application icons on home.

When I go to Configuration-> Apps Notifications
there's no option to enable it.

If I go to application configuration is there an option to enable it individually but is grayed out.

I search on the web but nothing solve this.
As discussed in comments, OP's device runs Android Go and has Android Go apps. 

Android Go doesn't support notification icons as explained in Lenovo forums Notification Dot missing on UK phone


  ....Android Go does not support notification access to apps,....