I don't think the Catholic Church teaches that Our Lady escapes the Judgement altogether; her immaculate conception, sinless life and assuption into heaven merely mean that, perhaps, her particular judgement occurred at her conception, or else was a mere restatement of her sanctity. At General Judgement her role is seen as advocacy for the souls being weighed, together with St. John the Baptist.
There is NO Scriptural support for any of those beliefs.
They are the fiction of a neutered church which incorporated heathen, feminized mythology into its liturgy and which continues to misconstrue matter and sexuality and salvation.