Unity 2020.3.3f1, zero values for:
scoresText.text = SystemInfo.supportsGyroscope.ToString() + "\n";
scoresText.text += Input.gyro.rotationRateUnbiased.ToString() + "\n";
scoresText.text += Input.gyro.attitude.ToString() + "\n";
scoresText.text += Input.gyro.userAcceleration.ToString() + "\n";
scoresText.text += Input.acceleration.ToString() + "\n";
scoresText.text += Input.location.isEnabledByUser.ToString() + "\n";
scoresText.text += Input.location.lastData.latitude.ToString() + "\n";
scoresText.text += Input.location.lastData.longitude.ToString() + "\n";
scoresText.text += Input.location.lastData.horizontalAccuracy.ToString() + "\n";
scoresText.text += Input.location.lastData.timestamp.ToString() + "\n";
scoresText.text += Input.compass.trueHeading.ToString() + "\n";

when SystemInfo.supportsGyroscope and Input.location.isEnabledByUser is True!

Trying to get Input.gyro.attitude from android 9 phone and getting a quaternion with zeros

definitely not solved, bug present in unity 2019.2.21

its not work in motorola with gyro in unity 5.6.1 and 2017.2

Definitely not fixed in 5.4.1! Please re-open this issue. I think it rather urgent! In the meantime, I would appreciate a workaround.

This isn't solved completely on 5.4.1. On my older android(6.0) devices and on my iOS devices it works fine. On the newer androids(6.0.1) is no reading at all from gyro.attitude. The newer androids. The biggest difference between the gyroscope that works with Unity is the higher power consumption (5 mA vs 0,9 mA) according my multi sensor recorder app.

The gyro.gravity output works fine though on all devices...

Not fixed. Running Unity 5.4.0f3.

Don't know why it is fixed. It does not work on last version

Using Unity 5.3.5, it is working sporadically... suddenly stops working. Restarting everything, rolling back code, not working. Then suddenly works again. Please fix!

Please re-open.
I can confirm that this is NOT resolved for unity 5.3.3 and a nexus5 running android 6.0