Flutter android app build release variant doesnt include assets in the res directory but debug and profile do, what is the difference?

I am new to flutter development, When i build my android project in release, the assets of the res folder are not included and the notification icons are missing, i have searched for an answer but couldnt find anything specific for differences between the two build configs,

Is there a place in android manifest or build gradle that needs to be configured for the release build to include the res assets? mipmap / drawable

thank you any help is appreciated!