Tha would certainly apply to His most blessed Mother. So, why are you digging up Romans 9?
Insofar as she trusted in God her Savior, but not because of any inherent righteousness in and of herself. ALL of our righteousness is as filthy rags before God.
God's righteousness was imputed to Abraham because of Abraham's faith in God's promises. Just showing you the righteousness was of faith and not of works because of the works of the law no man should be justified.