Youre right, platform support on MAUI is different than Xamarin so that part isnt necessarily accurate.
A large segment of the community uses XAML yeah. I think it just tends to be those that came to it through .net or those that came to it through native app dev. I prefer C#, and it seems MAUI has a better story around that with its partial focus on MVU style dev.
edit: it looks like xaml is optional with the community toolkits https://devblogs.microsoft.com/dotnet/introducing-the-net-ma...