There’s a reason treason was very narrowly defined. I think election fraud would be better classified as sedition, in my opinion.
I think it bleeds into treason. Elected officials, many of whom took an oath to protect and defend the Constitution planned, engaged in, helped and/or knew about and did nothing to stop, election fraud meant to unseat the winner and enthrone the loser, in conjunction with China (and maybe other countries), and in coordination with other US citizens.