here is my pubspec.yaml file , here I am added correct what documents says,
here is my project structure and icon added folder
here I had successfully generated launcher icons from there flutter packages , and also in the terminal it shows , icons successfully generated, but when I install app on my device it doesn't show app icon , here I checked the android manifest file and mipmap folder there also I can see my launcher icon inside mipmap folder , but it doesn't show it on device
I think due to the cache of the build your facing the problem. so clear the
flutter clean
andflutter pub get
it will work.