Despué After a long time I managed to solve the problem of pop-up windows for confirmation of push notifications on websites! The good news is that it is not a problem of Brave and it did influence an application that was blocking the window!
After this, I was able to correctly configure the notifications for the websites I want, Giving the necessary permissions and priorities to make it work properly.
There the problem returned, the notifications do not warn, neither the notification point, nor the notification banner, nor the sound of the notification. All configured to make this happen but no. I tried it with version 1.3.2 of the play Store, and version 1.4.0 rc4 of github.
I can’t do it anymore! I tried Chrome and they work correctly with identical settings.
I am very sorry that you cannot have this characteristic in Brave. I hope someone reads it and gives me a solution.