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 eye protection mode.
Vivo Y83 Pro has the same aperture of f/2.0 on both sides of cameras.
Yes, Vivo Y83 Pro does have the dual camera support. It has 13MP + 2MP dual rear camera.
No. Vivo Y83 Pro does not have the front camera LED flash but it does have the display screen flash.