This has a "hacker" angle because people regardless of party don't trust voting technology. Nearly the same % of people believe Hillary Clinton was the "real" winner in 2016 as believe that Donald Trump was the "real" winner in 2020.
Those two things don't mean the same thing. Hillary Clinton won the popular vote, Trump did not. The sentiment that the candidate who got the most votes is the rightful winner has limited correlation with Trump's stolen election arguments.