Hello, Welcome to Micorosoft Q&A,
what is exactly XAMLC in Xamarin.Forms.. ?
For XAMLC (xaml complication), you could refer XAML Compilation in Xamarin.Forms document. and it offers a number of benefits, such as xaml checking in complie-time reduce the file size of the final assembly.
why Xamarin.Forms does not accept BAML-like complication method.
Currently, we have not found the document to explain it, but in my opinion , Loading the binary representation is most useful when loading XAML files that define large resources, such as the generic.xaml files that define templates. However, xamarin form has no such scenario, it will load the binary file in each platform but not in the forms client side.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.