How about OpenYolo on SailfishOS?
I don't know if it is feasible, but to me OpenYolo looks like a nice feature on any mobile device. Here's a link to the Android project: https://openid.net/specs/openyolo-android-03.html
The project states:
If services could directly communicate with the user's preferred credential manager, manual authentication and its associated problems can completely disappear. If such a communication channel existed, then the following operations would be possible: ...
OpenYOLO defines a protocol for direct communication between services and credential managers, in order to enable these operations.