Genius of the Biden campaign to have Trump speak last
Reason being, Biden will be able to speak (even with stutters and stammers) but coherently the job they have done for the last 4 years and what is to come for the next. He will respectfully explain how the United States doesn't need a criminal as the next POTUS, who still has never admitted that Biden beat him like a drum in 2020.
This will enrage Trump who will be prepared to give a rally type response, but he'll become unhinged trying to reply to Biden.