You may need a new judge then. If he can’t be located and the judge insists your at a brick wall.
Maybe the lawyer can ask the judge to release immigration records using the passport number and search for unknown addresses, emails and/or phone numbers, or emergency contact relatives, but it’s a long shot for a divorce and more something that would be done locating a fugitive.
The judge may become so frustrated at the requests or wasting the courts time that he just grants the divorce.