Federal Courts of Appeal don’t have appellate jurisdiction over state courts. Stein could seek a writ from the United States Supreme Court (if she wanted to make an utterly complete fool of herself).
That’s where Soros is going. He’s got an army of lawyers and billions to put to this
The dissent in the MI Supreme Court decision to deny hearing her case is a template for arguing something slightly different to SCOTUS.
She has already made a complete fool of herself. In for a penny, in for a pound (as opposed to not sending good money after bad, a cliche for every occasion!)