No, this is not the translation.
Tu, terra (earth) del Cielo (Heaven/God).
This is symbolic language (which is difficult to express in a foreign language). Earth and Heaven become one in God (capital c - Cielo) /Heaven through Mary. Earth and Heaven become one. Communion of Earth and Heaven is reestablished through Mary. She is the vehicle, like Jacob’s ladder. Earth and Heaven (Cielo) become one in Mary.
What the phrase connotes is completely beside the point. Clearly "land of Heaven" doesn't make any sense as the title of a person without such a connotation, and yet it is also used of Pachamama, and I doubt this expression has ever been used of Our Lady in these languages.
When I google the term, most search results that come up have it being names for various apartment complexes, so one can infer that it means something like "heaven on earth," and not a reference to Jacob's ladder.
What's at issue is whether the expression has traditionally been used of Our Lady. I can't find any reference to Our Lady as ever being called that before Bergoglio's use of the term. If you Google "tierra del cielo Blessed Virgin Mary" ... you STILL get apartment complexes as the top term ... which suggests that the term is not associated with Our Lady (since otherwise those search results containing the combination would come up first). When I change the search term to "tierra del cielo Maria" and "tierra del cielo Virgen Maria" (getting rid of the English), apart from references to Bergoglio's consecration, the only thing that comes up is "Reina del Cielo y la Tierra" (Queen of Heaven and of Earth). Please find one reference to Our Lady as "tierra del cielo" and I might think this isn't BS.
Whoever translated this into English (presumably someone proficient in both languages) as "Queen of Heaven" probably was utterly confused about the expression, since it was completely unfamiliar as a title for Our Blessed Mother, and so took a swag at this being a reference to "Riena del Cielo y la Tierra".
If this is NOT a known title for Our Lady (and I have seen no reference to it being such) while being a known title of Pachamama (that has been demonstrated), then the problem stands.