Yes, Vivo Y83 Pro does have the eye protection mode.
Yes, Vivo Y83 Pro does have the dual camera support. It has 13MP + 2MP dual rear camera.
Vivo Y83 Pro has a scratch resistant display. However, it not confirmed by the brand that if it is Corning Gorilla Glass or some other technology they have used.
Yes, PUBG requires at least 2GB RAM and can run on Android phones with Android 6.1 and above. Vivo Y83 Pro has 4GB RAM and it is Android Oreo device. You can easily play PUBG game on Vivo Y83 Pro.
No. Vivo Y83 Pro does not have the front camera LED flash but it does have the display screen flash.