It is a very common rhetorical refrain among Sidney Powell and her ilk that there are "hundreds of eyewitnesses" or "[largenumber] pages of eyewitness testimony".
Many of those eyewitnesses were given the opportunity to stand up and speak at the pretend "hearing" in Michigan today. It was exactly what you would expect: all of their "testimony" was baloney like I saw a truck with boxes in it. I didn't get to see what was in the boxes, but I just know it was fake Biden ballots. The entire hearing was nonsense like that, with nobody even in their own words claiming that they positively saw somebody doing something specific that might actually be illegal.
But of course, exposing actual illegal acts wasn't the point of the meeting or the testimony. The idea is simply that a large enough number of people declaring something they saw to be "suspicious" should be enough to disenfranchise everyone who voted for Biden.