He appears to have tried to force Georgia to create artificial votes for him - political coercion to an election official. Possibly a bribe or and a threat.
He wants everyone to agree with him to be a "team player". He is even taking his own vice president to court to try to prevent him approving Biden.
There is another open case for Trump actively suppressing the black vote which is election fraud. (At least in a Democracy).
They say the punishment should fit the crime, and this would be poetic justice.