Jeffrey R. Holland teaches that Jesus was Jehovah in the preexistence; he is the "Second Adam."
Jeffrey R. Holland, Witness For His Names (Salt Lake City, UT: Deseret Book, 2019), 17
THE LAST ADAM
Just as Jehovah and Michael acted together under the direction of Elohim in the days of creation, so they performed complementary roles under His direction in mortality as well. Michael became the first Adam, giving us physical life. Jehovah became Jesus, the Last Adam, who gave us eternal life. The Fall of Adam and Eve and the Atonement of Christ were always intended to be taught as complementary parts of a common plan.
ROMANS 5:12-21; 1 CORINTHIANS 15:45