Could be, but Powell is in a little different situation, she is a lawyer and took an oath to not represent falsehoods to the court.
If they can prove she knowingly did that, at the very least, she will lose her law license and ruin her career, same goes for Guiliani and the other lawyers on the case that were indicted.
In fact, even without the indictments, all the attorneys are likely to have licenses pulled.
Bar licenses are another matter, but even there, the law is to the effect that good faith is assumed and that minimally plausible claims and apparent misrepresentations are not in themselves grounds for civil, criminal, or professional penalty. If they were, many criminal defense lawyers would be expelled from the bar and sanctioned by courts. Indeed, a great many civil cases are founded on false claims, with the pretrial process meant to weed them out. Losing though does not normally expose the lawyers to sanction.