Hi Alan,
Thank you for your contacting Syncfusion Support.
Query : Is it possible to build a SfMenu and menuitems completely in xaml? I can't find any examples.
From your query we understood that your requirement with UWP SfMenu control, and it is possible to build SfMenu with its item. We have prepared the sample for the same and it can be downloaded from following location:
Screenshot:
For more information, refer the following UG link:
Please let us know if you need any further assistance on this.
Regards,
Vijayalakshmi VR