In this scenario, the entirety of present-day Finland, along with all its infrastructure and the people residing there, gets ISOTed back in time to the same day (23rd June) in 1939. What do you think would happen next- how would you envision things panning out, how well (or poorly) would present-day Finland fare, how would their apparent arrival from the future be received by the various downtime world leaders, and how radically differently would you envision WW2 progressing ITTL?