Though it wasn’t part of your question, I should add the significance of all this. It is crucial to the Incarnation and the Divinity of Christ and the Holy Trinity.
Those who have a different view of these, invariably have a different view of Mary as the mother of God. It all fits together in the fullness of the (Orthodox) Christian faith.
That Mary is the woman through whom God became flesh is not in dispute, but God (Specifically God the Son) has existed for all eternity, and has no mother.
I’ve attended Mass for many years, and increasingly, I am having difficulty embracing the official position on Mary.