Frost (1997)

Time of darkness. Time of fire kindled against cold and fear. During the Holy Night, the seven year old Micha has to escape with his young mother Marianne from the violence of his drunken father... During their one week odyssey through frozen Germany, mother and son meet people to offer them shelter... Crushed by their own poverty, or dominated by their feelings of being lost, these people just hurt them deeper and they can be nothing other than stations of their continuous escape

Unfortunately the movie Frost is not yet available on HBO Max.