Saints notes that George Albert Smith reversed Helmuth Hübener's excommunication in 1942 after learning about it after the end of World War 2.
Saints: The Story of the Church of Jesus Christ in the Latter Days, 4 vols. (Salt Lake CIty: The Church of Jesus Christ of Latter-day Saints, 2022), 3:518, accessed May 10, 2022
President Smith had since thrown his energies into alleviating suffering, injustice, and hardship. He arranged for the first printing of the Book of Mormon in braille and organized the first Church branch for the deaf. After learning that Helmuth Hübener, the young German Saint executed by the Nazis, had been wrongly excommunicated from the Church, he and his counselors reversed the action and directed local authorities to note this fact on Helmuth’s membership record.