I have gone through the documentation of using custom fonts (https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/text/fonts)
The document says about iOS, Android and Windows.
How to achieve in macOS. To give better clarity, here is my structure.
I have a Xamarin.Mac cocoa project thats using Xamarin.Forms (3.0)
My controls that need custom font are in XAML.
I have followed process given in documentation for iOS but it does not work.