Unfortunately, I have to say this again:
US election infrastructure isn't perfect and there's still work to do to make it more secure. But there is simply no credible evidence that the 2020 election outcome was altered through technical attacks, despite exhaustive scrutiny.
Shortly after the 2020 election, when these discredited claims were first raised, 58 of my colleagues and I issued this statement:
https://www.mattblaze.org/papers/election2020.pdf .
Nothing we've learned since then alters my assessment.