Were there Ents in areas not covered by LOTR?

[Child of the 7th Age]

This is in regard to Entwives.

Tolkien does tell us this in his Letters. He doubts the Entwives survived. They were probably killed off by Sauron. But if they did manage to survive, he tells us they would be in the far east and south, probably employed as slaves on large plantations.

sharon