If you want some windows-forms-esq app development, I highly recommend checking out Flutter Flow. It isn’t exactly cheap, but I’ve used it for some basic personal apps.
I kinda doubt FlutterFlow would meet my needs, it looks like it's primarily build on web technologies which is a nonstarter for this.
As far as I know, it's the opposite (using Skia to render). Flutter for the web is a second-class citizen, whereas for mobile apps, it's quite productive.
FlutterFlow is just the UI to build Flutter apps, which yes, is built on web-tech. However, Flutter runs natively on mobile devices.