That’s a feature added in Android 12 that changes the apps themes based on the wallpaper. While other OS’es like Windows 10 and 11 have a similar feature, on Android it’s more complete and app backgrounds etc. are also tinted based on the wallpaper’s colors as well. Why they haven’t implemented a similar feature in their OS?
Except this is nonsense. Full on dumpster fire UX is the biggest liability most OSS has. It is not user friendly, and assumes way more user knowledge to do the basics.
If FOSS actually was competitive on UX, let alone better, it would be far more popular.