I think this is likely because corporate interests drive the news cycle not scale of human suffering.
Far less corporate interest in Sudan than say Venezuela where the currently less violent conflict is getting more media attention. Venezuela is really the oil companies engaging in regime change to get access to their oil, so the news is pushing oil company funded pro war PR.
Note they are already pushing terrorists coming across the southern border narrative. I hope I'm wrong but I'm expecting a Hispanic terrorist attack false flag as pretense to the full scale invasion.