No, it's not as widespread as some will have you believe. But in a couple of districts in Michigan, the number of total votes is literally impossible. You can't have double the number of votes vs. registered voters, even if you allow for every "what if" scenario. Again, not widespread, not enough to sway the election. But it is there (I'm also not alleging direct involvement from the Biden campaign) and the people involved in facilitating it should be investigated, and probably charged, and it may even happen. Of course, by the time all that wraps up (investigations do take time) it will be largely forgotten by the public, and will be at most a local story.