There's no friendly or unfriendly moderator. Only a moderator who will ask questions, proceed with follow ups to press the candidates, and who will keep order and prevent it from turning into a fiasco.
And THAT'S why Trump wants an audience and a friendly moderator. He needs to riff. He needs the energy of the crowd. The moment he's pinned down on policy, he distracts and lashes out. Because he has no idea what he's talking about.
We already know Trump is liar. He can hold his pep rallies and blather on Truth Social if he wants to waste everyone's time.