Fuchsia has landed precision scroll related field at https://fuchsia-review.googlesource.com/c/fuchsia/+/673071/2/sdk/fidl/fuchsia.ui.pointer/mouse.fidl

Proposal

Flutter can use these fields around https://github.com/flutter/engine/blob/f4cb61cefccc1837ec26d7c0e68a70f44912935e/shell/platform/fuchsia/flutter/pointer_delegate.cc#L297

Fuchsia: http://fxbug.dev/101287