Looks like the camera plugin now has support for "sensorOrientation"

[HudsonAfonso]

any update? orientation? firebase_ml_vision: 0.9.0??
please

flutter/flutter#19274

Current State of This Issue

The main implementation of this is done. With an example project that is used to test live view with ML Kit on different devices.

However, there is still one limitation in the camera plugin that are needed to complete this.

• Access to the rotation of the physical camera. This would help the implementation work with landscape mode and various devices with less common camera rotation, such as tablets.

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Looks like the camera plugin now has support for "sensorOrientation".
flutter/plugins@87e2bdc#diff-32bf6b6597dea420f832a0e446c8a708