Currently, I am working on hobby-project based on Flutter. I researched libraries and didn’t found any good chart library.
I think it will be not a huge task to create Flutter renderer (by combining ios, android, js renderers)
Another good news: Flutter brings to desktop, so Flutter will be on each platform, which d2v want to support.
Of course, before working on Flutter d2v should have iOS support.
It is sample how people use Flutter & Kotlin Native - https://tech.olx.com/fast-prototypes-with-flutter-kotlin-native-d7ce5cfeb5f1