Hi @JakeShapley ,
I do not have any information regarding ArcGISRuntime for Flutter, but wanted to offer an alternative. We have a product, ArcGIS AppStudio, that is a low-code solution for building cross platform (iOS, Android, Windows, Mac, Linux) applications using the Qt QML language and the ArcGISRuntime API for Qt. Please feel free to message me if you have any questions regarding it.
Best regards,
Trevor Frame