All those OT passages you claim are about Mary are just assumptions.
There is NOTHING in them that indicates that the mother of the Messiah is the one alluded to in any OT passage short of Isaiah 7.
Christians North, South, East and West, have celebrated these passages as glimpses and celebrations of Mary, in hymns and poetry, and as illustration, motif and prophecy, for millennia, and still do.
The Mother of the Incarnation is great, only because the Incarnation is great beyond all telling.
And the Virgin of Nazareth, daughter of Abraham, of the House of David, in her wonderful hymn sees these blessings extending from the far past to the far future.
Knowing she has conceived Christ, she, the mother of Our Lord, say this is "according to His promise to our ancestors, to Abraham and to his descendants forever.
Ancestors and descendants.