Hello, I am developing an application for the Arabic language, so you have to use FlowDirection but in the Telerik controls, it seems that they are not implemented.
Precisely the RadTabView does not change the order of the tabs according to the FlowDirection property of the page.
FlowDirection property could be used in Telerik UI for Xamarin controls which inherit from the Xamarin.Forms VisualElement class and the device language and culture are right to left. The FlowDirection property could be set, for example, to the following controls: - RadEntry, - RadButton, - RadExpander, - RadAccordion, - TabView for both content and header text.
I have attached a sample that shows how the FlowDirection could be used in the controls listed above. Please download it and give it a try.