There are differences. Most modern apps use .NET Core, which in itself is cross platform. Most of the time, they use a UI framework that is be cross platform as well (AvaloniaUI).

Of course newer apps and older apps made with .Net-Framework that may use Windows specific libraries (eg. System.Windows.Forms, System.Drawing) and lose their cross platform compatibility. They might work with Wine.

I think it’s either Gargamel or Gurgelhals, depending if it’s newer or older, from the tv series or from the comic books.

The tv show uses Gargamel.

The older comics use Gurgelhals. The newer ones use both, depending on the publishing house.