Ukraine is shown as a member of the UN.
Ukraine was not a country until 1991 when the USSR collapsed.
Eleanor has a condolence card from Queen Elizabeth. George VI was King at the time of FDRs death and it would more likely be that a condolence card came from him rather than his wife. The current Queen Elizabeth did not become Queen until 1952, several years after FDR died. The scene also mentions a card from Princess Ingrid, presumably meaning the daughter of the king of Sweden, who was married to the Crown Prince of Denmark.
The speech Franklin D. Roosevelt gives in front of Congress before leaving for the Yalta Conference was not, in reality, given until after he returned from Yalta.