We ask Mary to *pray for* things, such as the conversion of Russia.
Incidentally, Mary’s request was that the consecration be made *and* that people go to Mass on five first Saturdays.
And she requested that people pray the Rosart and repent of their sins...
https://www.bluearmy.com/the-message-of-fatima/
The Fatima apparition was a “lying sign and wonder”. Our God never sends apparitions of people. He sends angels or comes Himself. No one in the Bible prayed to Mary. Jesus taught us to pray to God the Father.