There were concerns about potential election interference in the 2020 US presidential election, but as far as I'm aware, there hasn't been any concrete evidence of widespread election manipulation. There were measures put in place to ensure the integrity of the election, such as increased use of mail-in voting due to the COVID-19 pandemic, and the deployment of observers to monitor polling stations. While there were certainly contentious issues surrounding the election, such as claims of voter fraud and disputes over the validity of certain ballots, the overall outcome was deemed to be fair and legitimate by the majority of experts and observers.