Don’t remember the “find votes” request or attempts to find a legal-enough-to-muck-things-up way to replace real electors with fake ones, or similar to throw the election to the House to decide, then?
Those have been charged. He’s in court for a bunch of other stuff, too, some of which was brewing before 2017 but his DOJ ruled they had to pause (including investigations, because you need to e.g. issue subpoenas for those to do their work) until he was out of office, and nobody tried to fight that, so it’s just now finally happening.
I'm not sure what you're arguing here? If someone is accused of committing three crimes, but only one is "serious", then the person should only be prosecuted on the one, but not the other two?