Only part of it was. There was clearly enough fraud and violations of state laws to change the results of the election without even getting into the foreign crap.
Legal people could chime in (and I hope they do) but to my simpleton mind it seems since there was a massive criminal stolen election committed by many entities including foreign entities, in many if not most states, that just cherry picking parts of the evidence to hear and rejecting other evidence because it is classified/beyond the SCOTUS jurisdiction is just not legally sound.
The entire fraud needs to be addressed, not just bits and pieces of it.