I won't be recommending that anyone use Dart or Flutter on new projects.
You seem to think Google cares at all. Android has been languishing and Flutter is lightyears ahead. KMP is junk compared to what Flutter has accomplished with a fraction of the bells and whistles.
It's really neat how many no_std I've seen popping up lately. I'm hoping stuff like Hermit takes off and we can finally stop worrying about Log4Shell or cURL.