Yes, Vivo Y83 does have the 3.5 mm headphone jack.
There is no official announcement from the company if Vivo Y83 will support 5G network in future or not. But looking at the technical side of the phone specifications, we think that Vivo Y83 will support 5G network in future.
No. Vivo Y83 has 2 slots dedicated for SIM card and a separate slot for the MicroSD card. You can expand phone storage by up to 256GB with the help of the memory card.
No. Vivo Y83 does not have the NFC support.