No. Vivo Y83 Pro does not have the front camera LED flash but it does have the display screen flash.
Yes, Vivo Y83 Pro does have a dedicated MicroSD card slot.
Yes, Vivo Y83 Pro does have the eye protection mode.
Yes, Vivo Y83 Pro comes with the earphone in the box. The other accessories include - power adapter, USB cable, protective case, sim ejector tool and quick start guide.
Yes, Vivo Y83 Pro does have the face unlock feature.