Then they are late to the party. The Catechism of the Catholic church says this......
https://marian.org/mary/in-the-catechism
969 "This motherhood of Mary in the order of grace continues uninterruptedly from the consent which she loyally gave at the Annunciation and which she sustained without wavering beneath the cross, until the eternal fulfillment of all the elect. Taken up to heaven she did not lay aside this saving office but by her manifold intercession continues to bring us the gifts of eternal salvation … Therefore the Blessed Virgin is invoked in the Church under the titles of Advocate, Helper, Benefactress, and Mediatrix."[512]
And Catholics don't understand where we get the idea that they treat Mary as part of the Godhead.
Right here they do.
Titles and responsibilities scripture assigns to the Spirit and or Christ. For everything He does Rome seems to have an equivalent for rcm(roman catholic Mary).
COREDEMTRIX....
Further taking away from the one and
Only WAY to the Father God.
.
I Am the Way
The Truth and
The LIFE.
.
NOONE comes to the Father but By ME!
Them thar words don’t mean what they plainly say, ya unwashed Philistine!
—Catholic_Wannabe_Dude(Hail Mary!)