Nothing happens for onHover. Why?

.overlay {
                Rectangle()
                    .frame(width: 8, height: 100)
                    .cornerRadius(4)
                    .foregroundColor(isLeftBarHighlighted ? Color.gray.opacity(0.8) : Color.gray.opacity(0.5))
                    .offset(x: x1Movement - geometry.size.width / 2.0 + 300.0 - 8.0, y: 0)
                Rectangle()
                    .frame(width: 16, height: geometry.size.height)
                    .foregroundColor(Color.gray.opacity(barTransparency))
                    .gesture(DragGesture()
                        .onChanged { value in
                            withAnimation(.easeInOut(duration: 0.1)) {
                                x1Movement = value.translation.width
                            }
                        }
                    )
                    .onHover { isHovering in
                        withAnimation(.easeInOut(duration: 0.1)) {
                            isLeftBarHighlighted = isHovering
                        }
                    }
                    .offset(x: x1Movement - geometry.size.width / 2.0 + 300.0 - 8.0, y: 0)
                Rectangle()
                    .frame(width: 8, height: 100)
                    .cornerRadius(4)
                    .foregroundColor(isRightBarHighlighted ? Color.gray.opacity(0.8) : Color.gray.opacity(0.5))
                    .offset(x: x2Movement + geometry.size.width / 2.0 - 300.0 - 8.0, y: 0)
                Rectangle()
                    .frame(width: 16, height: geometry.size.height)
                    .foregroundColor(Color.gray.opacity(barTransparency))
                    .gesture(DragGesture()
                        .onChanged { value in
                            withAnimation(.easeInOut(duration: 0.1)) {
                                x2Movement = value.translation.width
                            }
                        }
                    )
                    .onHover { isHovering in
                        withAnimation(.easeInOut(duration: 0.1)) {
                            isRightBarHighlighted = isHovering
                        }
                    }
                    .offset(x: x2Movement + geometry.size.width / 2.0 - 300.0 - 8.0, y: 0)
            }
        }
    }
}