The Lord cares for all of His children. He visits all of His sheep, including the lost sheep of Israel (see 3 Nephi 15:17; 16:1–3). All of His sheep are included in the process of the gathering. There is to be one fold and one shepherd. We are not privy to the circumstances of the lost ten tribes. It is not our place to speculate on such things but to press forward in the fulfillment of our duties and obligations to assist in the gathering of Israel as we are instructed and guided by the prophets of God (see 2 Nephi 21:12; 29:14; 3 Nephi 20:13; D&C 110:11).