portraitKeyboardHeight property
The height the device's software keyboard covers in portrait, in logical pixels, or null when the device has no software keyboard (a desktop window) or its height has not been measured.
Measured on the device itself, with its stock keyboard and no predictive-text row toggled off. Showing it is a per-simulation choice (DeviceSimulation.keyboardInset), so a preset never turns it on by itself: resolve leaves the keyboard hidden.
Implementation
final double? portraitKeyboardHeight;