Who is the Davidic Servant; and is he coming soon/is he here now?
Avraham Gileadi, in his book, “The Book of Isaiah: A New Translation with Interpretive Keys from the Book of Mormon” quotes the Prophet Joseph Smith as making the following statement:
Although David was a king, he never did obtain the spirit and power of Elijah and the fullness of the Priesthood; and the Priesthood that he received, and the throne and kingdom of David is to be taken from him and given to another by the name of David in the last days, raised up out of his lineage.
He also quotes from the dedicatory prayer offered by Orson Hyde on the Mount of Olives,
Let them know that it is Thy good pleasure to restore the kingdom to Israel–raise up Jerusalem as its capital, and constitute her people a distinct nation and government, with David Thy servant, even a descendant from the loins of ancient David to be their king.
Duane Crowther in his book, “Prophecy, Key to the Future,” gives his opinion that King David will appear immediately before the Battle of Armagedon. He refers us to the following scriptures citing that this David will be responsible for building the temple in Palestine in the last days–Zechariah 6:11-13, Jeremiah 23:5-6, Hosea 3:4-5.
So, according to these sources, the Servant David is yet to appear.