Ok, I’ve saw in this topic: Android ... Receiving push notification with white blank push notification icon !? that maybe this question is not related with the Backendless’ API, but maybe someone can offer a suggestion like the one in this answer: set icon for push notification - Android however the informed links are out.
I’m using React-Native, has someone any suggestion how to set a custom icon in the push notification? Is there any place to change it? Because I tried to change the function setSmallIcon inside the Backendless module but it was useless.