“Insurrection” isn’t a crime you can charge for. Good luck finding anyone ever convicted of it in the history of the United States. (Hint: you won’t.)
On the other hand, conspiracy to overthrow the election and illegally place yourself in charge is absolutely insurrection, and he was charged for that. His actions on January 6 were even part of the indictment, and used as evidence of part of his criminality.
So yeah, he has been indicted on this already, Smith is trying to get him convicted in DC right now for it.
That’s all part of the other thread.