A portion of Trump's voters were obsessed with the Epstein files. When Biondi announced she had them on her desk ready to release they were giddy in anticipation. To them, this was the culmination of years of conspiracy theories that were finally going to be exposed to the world.
And Q-Anon and Q-Anon adjacent online personalities had already prepped them for what was going to be in it. They already had a list of names they found online and knew exactly what crimes that list committed. They were 100% certain Hillary, Obama, Bill, Nancy, Chuck and hundreds of other prominent Dems were in the report detailing their crimes with children. They were 100% certain half of Hollywood would be implicated. And they had been told the only references to Trump would be ones of his heroism in setting Epstein up and breaking up the whole global ring single handedly.
But don't expect them to have the obvious epiphany you're thinking, Trump will pivot to the next lie about all of it and 90% of them will buy it, even if it means Maxwell gets let out.