Get Pixel Fingerprint Feature on Any Phone with Fingerprint Quick Action
Developer ztc1997 from the XDA forums has put together this really cool app that uses your fingerprint scanner to trigger custom actions.
After installing the app, you’ll toggle it on in your accessibility settings. Afterwards, you’ll go back into the app and find all of your quick action options. Choose what action you want triggered when swiping or tapping your fingerprint sensor.
Check out the original thread and definitely give this app a try!
Download the app from the XDA thread here.