The allegation in the indictment claims otherwise, hence the indictment and extradition request. Then there’s the rape issue in Sweden, although I really have no idea how that will stand up if it’s reopened. Still, answering those questions f fact are why courts exist.
However, these allegations have come up before in Manning's trial, and they do not amount to much more than him trying (not succeeding) to help Manning cover her tracks, i.e., protecting his source as a journalist. He did NOT help Manning access more data. This article by Glenn Greenwald is a good read on the subject: