Hello sharjeel.
Its termed as parcel tray. No buddy this car does not support parcel tray. Even the jdm variant does not have it not it has any notches to hold one if you install one yourself.
Hand grips are must have sadly theres only one at passenger side. I dont know what was suzuki thinking. Where should i hang my ironed clothes? Passenger side? Lol one can buy them from aliexpress or from used car parts market. From suzuki it might cost 484949 million dollars.
As far as i remember this car does not support head rest. Even the jdm variants dont have head rests sadly.