Good news. It looks like Biden has won. Won the Electoral College by the skin of his teeth. Won by a more comfortable margin in the popular vote.
Trump is still posing legal challenges to the results. It will be hard for someone, as egotistical as Trump, to be a "good sport" and accept defeat. Maybe Trump will soon start a campaign for presidency in 2024? I wouldn't put it past him. He seems in his element on the perpetual campaign trail.
I doubt he would win in 2024, but he would be (I think) still a bit younger than Biden is today.
Trump will also have a lot of legal issues to deal with.
I can't picture him participating in the transition team. Looks like much of the transition work would take place around him.