Why ScrollView with ScrollViewReader does not scroll with animation

Question

I am using ScrollViewReader to slowly scroll images behind text. On my ScrollView I am using:

.onAppear {
                        withAnimation(.easeInOut) {
                            proxy.scrollTo(9, anchor: .bottom)
                        }
                    }

But it scrolling immediately and without animation. What am I doing wrong?

I am not attaching images, but they all have .id, so that's not a problem.