Neither of these claims is right. Personally, I doubt the election was stolen. I know of a handful of cases of voter fraud both anecdotally ("My mom [in a retirement home] told me to vote for McCain, but I know she really wanted to vote for Obama, so that's what I put.") and numerically[1].
I would not be surprised if one or two of the very razor thin House district elections in 2020 experienced enough fraud to flip the decision. This doesn't mean that I believe all of the Dominion voting system hack nonsense or anything like that. I just think only a Sith deals in absolutes.
1: https://apnews.com/article/ohio-voters-citizenship-referrals...