ocurred (6). 068B.0006
The iPhone "iPhone" could not
be restored. An unknown error
ocurred (6). 068B.0006
iPhone XS Max, iOS 15
That error could be your windows and iTunes it’s out of date and need to be update or your usb cable is not original , the third party software antivirus needs ti be deactivated, try all these troubleshooting and try to restore your iPhone again, see more info about that error in this link
iOS update and restore errors - Apple Support