Yes, Vivo Y93 does have the portrait mode in both sides of cameras.
No. Vivo Y93 does not have the in-display fingerprint scanner. Fingerprint scanner of the Vivo Y93 is located on the back side of the phone.
Yes, Vivo Y93 does have the HDR support in both cameras - front and rear.
No. Vivo Y93 is not a water-resistant mobile phone.