Don't apply status bar icons overlay on Oreo and Pie, because they can only partially be themed and therefore some icons disappear when that overlay is applied on O! 100% self-made icons. The Theme works on: Android Nougat Custom Roms. Android Oreo 8. 0 Stock and Custom Roms. Android Oreo 8. 1 Stock and Custom Roms. Android Pie 9.