He did not concede, and you'll see that in his statement. Transition happens regardless, between first and second terms.
His remark of 'facts bear him out' means that he is on the side of facts. Churchill used a similar quote, check it out. 'History will bear me out' or some such.
MAGA!
He said there would be an orderly transition.... But he didn't specify who the power would transition to (;