Yes, Nokia 8.1 display works as a flash under low-light conditions.
Yes, Nokia 8.1 does have the fingerprint scanner, which is located at the rear of the phone.
Yes, Nokia 8.1 does support Qualcomm Quick Charge. It also comes with 18W fast charger.
In the official packaging of Nokia 8.1 - you will get your Nokia 8.1, USB Type C cable, Power adapter, Headset, Quick start guide & SIM door key.