It would be strange if he wasn't eventually charged since he was definitely part of the plot.
This is a case that goes across eight states with dozens of defendants, some have already pled guilty, many are working with the prosecutors to provide testimony against peer and higher co-defendants.
Trump hasn't been charged yet, but people are still getting charged for the fake electors scheme every month, and since he was on the phone with these people convincing them to forge and mail in the documents, I can't see why he wouldn't be charged.
It's being investigated right now as to how to charge Trump, since he was personally involved in this scheme.
He'll probably be one of the last people charged.
Especially now that he was already convicted once and it isn't taboo or anything to charge him with felonies.
There are so many defendants, this was such a huge conspiracy that most of the trial still haven't started, and several defendants haven't been arraigned.
But it's going forward!