iOS : ToolbarItems not displaying on root navigation page

Hello all,

I got three toolbaritems in my app which display everywhere on Android.
Prob is on iOS it only shows on pages which are pushed in the navigationPage. When I'm on the root page of the navigation page, they don't display. How to force iOS to show them even if I'm on the root of the navigationPage ?

Thanks.

     var toolbarItem = new ToolbarItem
            {
                Order = ToolbarItemOrder.Secondary,
                Priority = 0,
                Text = "Help"
            };
            var toolbarItem2 = new ToolbarItem
            {
                Order = ToolbarItemOrder.Secondary,
                Priority = 1,
                Text = "Support"
            };
            var homeToolBar = new ToolbarItem
            {
                Order = ToolbarItemOrder.Primary,
                Priority = 0,
                Icon = "ic_home_black_18dp"
            };