@dobey Sure, not all devices has a fingerprint sensor. But using a fingerprint sensor in an app would be a benefit for the devices, that have this hardware feature. NFC and Dual SIM are also features, that not all devices have. But the operating system should support it. Anyway, the feature was only requested for Volla devices, which will have a finger print sensor.
Ubuntu Touch is not Android, but it should support requirements of a platform for mobile devices not limited by Smartphones. This includes customization if OEMs. Ubuntu Touch could alternatively use the approach of Jolla for Sailfish OS.
Anyway, this is out of scope of this thread. If someone know, how we could access the fingerprint event, let me know. Because the system needs this event, there must be somewhere on some level an API.