Yes, Realme X does have the Dolby ATMOS support. It is enabled by default.
No. None of the Realme models comes with earphone. Realme X standard box packaging includes Realme X mobile, USB Type C Cable, Power Adapter, SIM Ejector tool, Protective case, and a user guide.
Yes, Realme X does have the in-display fingerprint scanner.
Yes, Realme X has a USB Type C port. It also supports fast charging.