How to add View on all the pages using base page?

Hello Folks,

I would like to add a simple stack layout with height 50 to the bottom of all the pages of app.
Like, I need to show a progress indicator with the percentage in this view when user trying to sync the data.

On my side, I have BasePage and all the pages are extending from this page.
I tried below code for doing this.

BasePage.cs

            public void AddSyncview()
            {
                var syncView = new StackLayout();
                syncView.HorizontalOptions = LayoutOptions.FillAndExpand;
                syncView.VerticalOptions = LayoutOptions.FillAndExpand;
                syncView.BackgroundColor = Color.SeaGreen;

                var boxView = new BoxView();
                boxView.BackgroundColor = Color.Teal;
                boxView.HeightRequest = 30;
                boxView.HorizontalOptions = LayoutOptions.FillAndExpand;
                boxView.VerticalOptions = LayoutOptions.EndAndExpand;

                syncView.Children.Add(Content);
                syncView.Children.Add(boxView);
                this.Content = syncView;
            }

I thought the "Content" is pointing to the current page of content. So, I can take top stack layout and bind that content in that stacklayout.
so, I can call this method on BasePage OnAppearing and will get it working.

But actually, its not working.
This is replacing the current page content with "syncView"...