No. Vivo Y95 does have a dual sim card slot and a dedicated memory card slot. You can use 2 4G sim cards and a MicroSD card at the same time.
No. Vivo Y95 does not have the NFC support.
Vivo Y95 has an aperture ratio of f/2.0 for its 20MP front camera. While the rear camera has f/2.2 & f/2.4 aperture for the 13MP & 2MP cameras respectively.
Vivo Y95 does have the OTG support.