No. Realme X does not have the image stabilization support.
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.
No. Realme X does not support wireless charging. It has USB Type C port for the fast charging.
Yes, both cameras of Realme X - front & rear cameras - have HDR support.