Reading the stackoverflow post I see that it is possible but I couldn't replicate it in b4a, someone knows how to do it?
Here is the stackoverflow post: https://stackoverflow.com/questions/36907237/how-to-apply-gradient-to-status-bar-in-android
Here is the stackoverflow post: https://stackoverflow.com/questions/36907237/how-to-apply-gradient-to-status-bar-in-android