Yes, Vivo Y93 does have the HDR support in both cameras - front and rear.
Vivo Y93 does not have the front camera LED flash but it does have the display screen flash.
Yes, you can record full HD videos with 1080p resolution via Vivo Y93.
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.