How to increase the space between the bottom of the screen and Tab titles on Android using Xamarin Forms Shell?

Question

I have used ShellRenderer but I am unable to get the code working to add an extra space between the bottom of the screen and the icons. Here is an image:

I need to increase the space between the bottom of the screen and the tab item titles.

Here is the code that I have tried:-

namespace MyProject.Droid.CustomRenderers
{
    public class CustomShellRenderer : ShellRenderer
    {
        public CustomShellRenderer(Context context) : base(context)
        {
        }

        protected override IShellTabLayoutAppearanceTracker CreateTabLayoutAppearanceTracker(ShellSection shellSection)
        {
            return new CustomBottomNavAppearance();
        }

        protected override IShellSectionRenderer CreateShellSectionRenderer(ShellSection shellSection)
        {
            return base.CreateShellSectionRenderer(shellSection);
        }

        protected override IShellItemRenderer CreateShellItemRenderer(ShellItem shellItem)
        {
            return base.CreateShellItemRenderer(shellItem);
        }
    }

    public class CustomBottomNavAppearance : IShellTabLayoutAppearanceTracker
    {
        public void Dispose()
        {

        }

        public void ResetAppearance(TabLayout tabLayout)
        {
        }

        public void SetAppearance(TabLayout tabLayout, ShellAppearance appearance)
        {

            for (int i = 0; i < tabLayout.ChildCount; i++)
            {
                var child = tabLayout.GetChildAt(i);
                child.SetPadding(0, 0, 0, 20);
            }
        }
    }
}

Let me know how can I fix this. Thanks!