My understanding is that juries in America dont really deliberate on a verdict or a sentence. Thats up to the judge.
in a jury trial, the judge is there to manage the process and keep it fair. The prosecution presents their case, and the defense tries to poke holes and cause ‘reasonable doubt’.
yes, there are controls in place, like instructions on what may and may not be considered during deliberations, and yes, that restricts the jury’s decision significantly. For example, they’re not allowed to consider that Trump is a lying asshole who stole nuclear secrets when he left office, raped E Jean Carol or tried to lead an insurrection on jan 6 to overturn the government.
None of that really matters to this case. But the 12 jurors were ultimately the ones deciding that guilt or innocence or whatever. And they did so unanimously. The judge didn’t make the decision and tell them to come to a guilty verdict. (and the judge can only overrule such a verdict if it’s blatantly obvious they fucked it up. usually at that point they start over with a new trial and a new jury.)