You are incorrect. It is absolutely true. The electoral college vote had not been put to congress and his concession speech was on December 12 or 13 of that year.
This time the outgoing president had already lost every single recount in the states, including Republican states, 61 lower court cases and pleadings in the Supreme Court, yet supported overthrowing the process of the electoral votes being recorded by congress in January. If he could have overthrown the constitution and the election in January, the piece of shit would have. Then we would have all been screwed. No constitution, no rule of law, no free elections that counted. The only thing he stopped was peaceful transition. Not much for honoring oaths and historic American traditions and precedents if they get in his way.