Unfortunately with those barriers you won’t be able to find it. Hopefully you can get a replacement phone soon and to prevent this in the future make sure she remembers her Apple ID info or have it written down somewhere safe at home to hopefully track the phone but even then a stolen phone is likely gone for good.

To reduce the chances of her new phone from getting stolen in the future make sure she keeps it secured in a bag or purse and well attached to her person. Some criminals are so brazen they will even snatch phone out of a persons hand depending on the area.