Could it be still possible for me to restore my foreskin?

Probably not..., but: Once surgical tissue removal is forever on purpose; likewise, after circumcision. Most men appreciate it for getting rid of local irritation/infection with tight long foreskin. Occasionally, very few may like its post-circ appearance due to misunderstanding expectation or changing mind after surgery although done under informed consent. If in doubt, talk and work with surgeon... Best wish ...