It appears that by the amount of problems that I have encountered so far that Telerik UI for .NET MAUI has not been tested at all on IOS.

Your own ControlSamples do not run for IOS.

Anyway..

Next problem.

IOS Specific only.

           <telerik:RadComboBox ItemsSource="{Binding Items}"
                                     Placeholder="Select Status"
                                     IsDropDownClosedOnSelection="True"/>

note that to use the Telerik Custom Controls it is necessary to either add an x:name to each control, or dummy instantiate each one.

This can be done in MauiProgram.cs.

Add line

  _ = new RadComboBox();

 

A runtime error occurs when using telerik:RadComboBox and the application will abort.

2022-08-05 10:24:05.765 Xamarin.PreBuilt.iOS[5889:422588] *** NSForwarding: warning: object 0x2837b0780 of class 'Telerik_Maui_InputElement_RadTextField' does not implement methodSignatureForSelector: -- trouble ahead
2022-08-05 10:24:05.765 Xamarin.PreBuilt.iOS[5889:422588] *** NSForwarding: warning: object 0x2837b0780 of class 'Telerik_Maui_InputElement_RadTextField' does not implement doesNotRecognizeSelector: -- abort