Yeah, but there's an interview out there, on a trending gossip website, talking to a random yahoo, that totally blows the lid off all this! You'll see!The FBI and DOJ have found indications of massive voter fraud in multiple states perpetrated by Dominion Software.
No they haven't.
Your link to the Barr article is just rehashing his notice to the DoJ to go above local prosecutors. It didn't say anything about the FBI and DOJ having found "indications of massive voter fraud."
Trump's tweet claimed that, but Orange Jesus also claimed Obama was born in Kenya and Ted Cruz's father was involved in the JFK assassination, as well as retweeting a bizarre QAnon conspiracy theory that bin Laden was alive and Seal Team 6 was dead, not to mention about another thousand other bizarre things. So Trump proclaiming it does not make it so.