Hi!
I've googled a lot of different resources and basicaly found no answer to my question which is: is it possible to create this 
using Xamarin Forms? I can achieve changing the color of the ToolBar to transparent but the problem is that the page's content is clipped by the toolbar and so I can't get the same effect. Right now the only solution I see is to create my own "fake" system of Toolbars and Tabbars with this functionality but it won't be native so it's not preffered