Ah, I should clarify and provide context.

We're a mobile focused continuous integration and deployment solution.

When deciding which platforms to support, we looked at current adoption for Native iOS and Android (this was no brainer), Hybrid (PhoneGap, Ionic, Cordova) and "emerging" platforms (React Native, Xamarin).

Ultimately, we decided to prioritize the others first. CI/CD service is applicable to any mobile development team.. but to your point, buddybuild is better suited to those other platforms, as those are the only ones we support.

In our experience (which also factors inbound requests), Xamarin is still relatively nascent as compared to the others.

That said, you can should expect to see Xamarin support soon :)

Also, fwiw, Microsoft purchased Xamarin only recently.