Yes, Vivo Y83 Pro does have the eye protection mode.
Yes, Vivo Y83 Pro does have a dedicated MicroSD card slot.
No. Vivo Y83 Pro does not have the fast charging support but it comes with 5V / 2A power output charger, which charges the phone quick.
Yes, Vivo Y83 Pro does have the dual camera support. It has 13MP + 2MP dual rear camera.
Yes, Vivo Y83 Pro is a VoLTE mobile phone.