implementation "com.google.accompanist:accompanist-systemuicontroller:0.27.0"

Theme.kt add this

   val systemUiController = rememberSystemUiController()
 if(darkTheme){
        systemUiController.setSystemBarsColor(color = colorScheme.background,darkIcons = false)
        systemUiController.setNavigationBarColor( color = colorScheme.background,darkIcons = false)
    }else{
        systemUiController.setSystemBarsColor(color =colorScheme.background,darkIcons = true)
        systemUiController.setNavigationBarColor( color =colorScheme.background,darkIcons = true)
    }

    MaterialTheme(
        colorScheme = colorScheme,
        typography = Typography,
        content = content
    )

Done