Not OP - but almost all of the Flutter work I've ran into is mobile-centric.

If you're looking for cross-platform on the desktop it really hasn't been a popular option vs. Electron/Qt.

Given that "Today, we are excited to announce that Flutter is now stable for macOS and Linux, in addition to Windows!" thats not surprising

Of course, and to be clear I'm excited there are more cross-platform options even though I've had a reluctant history with Dart.

I read "I don't think I've ever seen Flutter in the wild" to include mobile, but maybe I misinterpreted