From what I've read, the chances of getting a jury verdict overturned on appeal are generally low. The appeals court would have to find that, for example, the law was improperly applied, exculpatory evidence was plainly disregarded, the jury instructions were incorrect, and so on. In this instance, it seems that Judge Merchan did an excellent job, protestations by Trump and his sycophants notwithstanding. That's why the rhetoric from his supporters, especially elected officials who know better, is so reprehensible. It's one thing to say you think the evidence doesn't support the jury's conclusion, but their bombastic condemnation of the verdict just undermines the justice system further.
As for incarceration prior to sentencing, I don't see that being requested or happening. As reprehensible as Trump is, he's not a flight risk, though TBH I wish he'd leave the country for Russia, Hungary, or some other place and never return.
