Is this laptop internal hdd fake

Nope.

It’s Real.

Enter the Serial Number into WD Warranty Status … https://support-en.wd.com/app/warrantystatus

And this is the result (says “out of region” cus i just clicked on USA as the country of purchase … have no idea where you bought it)

Fake hard drives will not be in WD’s Warranty System.

They will have a dodgy/invalid serial number.